Was it sexual assault?

Trigger Warning: mentions of sexual assault

A few years ago I attended a field party in June with friends, and proceeded to get extremely drunk- unbeknownst to myself; my friends had left me to go visit others, leaving me with a schoolmate I didnt know all that well- from what I can recall, he was much less intoxcated than I; and all I can remember after that is that we had sex and very few sentences were exchanged between us- I cannot recall consenting, nor can I particularly recall what happened when he lead me away from the party into the forest- Supposedly my friends had later found me in the woods, and had then led me back to the party, we later left- at this point I was so intoxicated to the point where I could hardly speak and kept vomiting out of the car window onto the tarmac. I am hesitant to address the situation as rape- as I dont recall physically attempting to stop him, nor to my knowledge did I explicitly state I was uncomfortable and scared in this situation- as I was 15 and still a virgin, it left me feeling disgusted in myself and extremely guilty- is this rape? Or am I just overreacting?