Was it right for me to punch them?

For a long time now I regretted this so much. Me and my s/o were having a fight and out of anger I layed hands on them accidentally and I hated myself so badly... I didnt want to hurt them but I just also hated on how they forced themselves onto me just so i could forgive them, idk if you can count that as SA because I didn't like it and how they told me their ex was better when that ex hurted them alot to the point I had to deal with someone extremely suicidal who tries to off themselves every small fight. I know they didn't mean to do that to me but apart of me hated it so much.