ED after me and my girlfriends first time having sex

I've only been on a couple of dates with my girlfriend and the other night we had sex for the first time and now I believe I could be suffering from ED. I don't know if it's all in my head or what because I haven't been waking up with morning wood ever since and this has never happened before. Also I can make myself hard if I really try but I'm getting anxiety about being able to achieve an erection in the moment now. If anybody else has had this happen or knows how to help please let me know.

I'm trying to start NoFap to hopefully help sort this problem before it gets any worse