Advice?

I'm 27M and recently broke up with my boyfriend because I can't perform in bed. We did try a few times but the thought of it stresses me out which is weird because I've never had problems about it before. I was thinking that it could be a result of the stress from school and finals but even after the exam season was over I still found it hard to have sex which was why it was one of the reasons we separated.

So now, here I am a bit confused with myself as I never had problems before but now as a single man whenever I tried having sex with another man I can't seem to do it. I still get the urge and masturbate but sex with someone makes me panic which confuses me. So am I asexual now? Idk, I'm just so lost.