Boss Guilt thought loop help..

So I am stuck in a loop. My boss was being very agressive about wanting something done – and I’m working on it but there are other people involved that I have to convince…and she said “who is it” insinuating that she would just go take care of it. I said “I got this” in a rather aggressive tone. Totally feeling guilty- but happy in a way I stood up for myself. Ahhhh help. Can’t stop going over it!