Some emotions just surface a bit too easily, but if you didn't hurt her in any way, I think that bad thought is something you can let slip away.
That said though, is it a frequent thing? Either those emotions, or your mother doing things out of her own accord when you don't want her to?
If so, perhaps you should consider trying to discuss that with her. To ask more frequently if it's OK for her to do certain things, or enter spaces where you are at certain times, just so that it can avoid having your mood pushed negatively.
Figure it's not intentional from her part, so if you can come to that understanding...
As someone who has their parents living with him, and my own mother being someone who was always used to take care of the house at her discretion, she does not sit idle. And while I have to appreciate the weight that it takes off me, I also had to make her understand that she shouldn't take liberties to do everything she can to help me, because at times it just does -not- help... and it's difficult to not feel a bit annoyed after a while, when those decisions of hers throw things out of line for me.
So, help create the environment where you don't need to have those negative reactions. Might help take that bad feeling off your head too.