If you feel like seeking out clinical assistance, then you should absolutely do it. There is no shame in asking for help—in fact, acknowledgement is the first step to acceptance. This is one of the most difficult but bravest things you can do. Once one embraces their condition for what it is, they can proceed accordingly, working to attain diagnosis, treatment, recovery, and hopefully remission. After you've arrived at the ER, you will quickly be admitted and taken to a psych room that is self-harm proof(covered tvs, curved edges, removed objects). Depending on staffing and location, you may have a CNA (certified nurse assistant) who will keep you company until you are transported to ensure your safety. American ER's are generally overworked and understaffed, so no matter where you are, expect everything to move at a turtle's pace. The first individual you will likely see is a nurse, who will ask you basic medical history and reason for admission. The level of compassion varies from nurse to nurse (they are Er nurses, not psych), so don't be put off if they seem irreverent. They might take some labs, conduct an ekg, or perform other tests they deem necessary. Overall, it will be relatively non-invasive. You may see the attending ER doc or resident, but that is not guaranteed. What is guaranteed is the referral of a social worker and a psychiatrist (also a doctor). They will both ask you questions regarding your mental health. It may feel invasive and repetitive, but it is imperative to be honest in order to receive adequate assistance. They are also rather adept at assessing implicit and unspoken communication markers, so lying is generally not advised. Know that voluntary psych recipients are allowed to be discharged from the facility at the earliest appropriate time, not to exceed 5 days, excluding Saturdays, Sundays and holidays. Once admission is decided, the charge nurse or nurse manager will look for an available bed at the nearest facility (if there is no room in your hospital). Transportation services are provided via ambulance. Lying on a stretcher, you will be escorted by your EMS technicians to the hospital's psych facility entrance, wherein a psych nurse will be eagerly awaiting your arrival at the entrance doors. The most uncomfortable part of your stay will be at the very beginning. Once, and only once unless otherwise warranted, you will be asked to remove all articles of clothing (down to your underwear) while being observed by a same-sex staff member. They will assess your body for self injury and document any physical trauma (former or present) for charting purposes. This will take less than five minutes. You will likely be asked the same questions the psychiatrist and social worker asked you in the ER (reason for admission, mental health and trauma history, severity of suicidality/homicidality). You will then receive a daily schedule, menu, and be escorted to your room. Days are highly regimented, surveillance is round the clock, and group/indivudal therapy sessions are emotionally and mentally exhausting. The crowd of prospective patients is highly variable according to location, but generally speaking, most individuals there will be just like you. After your stay, you will be asked if you would like to maintain continuity of treatment by way of an PHP/IOP. These are step-down facilities that offer continuation of care but allow you to return home at the end of the day.
This is a general overview of what you should expect. I left out lots of specifics and semantics, so please feel free to ask any questions if you have them. I've been admitted to inpatient psychiatric facilities three times, so I know my way around the block atp. Note that these facilities serve the sole purpose of initial intervention and stabilization. This translates to a brief visit just long enough to introduce you to any meds, prevent/treat side effects, and ensure you are not a danger to yourself or others. The rest of the work continues afterward, either in IOP/PHP or with private therapy. Discharge will not be permitted without assurance that you have a clinical support system to turn to upon leaving.