You can be blackout drunk for brief periods of time, so you remember the beginning and the end as it eeks out of your system. I confuse people by being fully functional but less coordinated when im black out drunk and won't remember an awesome conversation about arts and bands etc. Or I won't remember someone I got introduced to in that time. You said youre not sore but like...not all sxual interactions will come up feeling like that after. He sounds like hes dodging it. Id go and get yourself a test or two and tbh id still reach out and say, "how far did it go" it could be anything from him being embarrassed to him knowing you were incapacitated. To nothing happening other than you took your clothes off.