Not sure what I did

I am not sure what happened or what I should do.

I have a roommate that I have lived with for 2 years. We are both females in our mid twenties. Her boyfriend was over the other night but she got called into work. So her boyfriend, let’s call him Mike stayed at our place. I got a call to go out and meet friends so Mike came too. We got absolutely hammered. I don’t remember much. I sort of remember getting back to the apartment with Mike. I remember trying to kiss him but he said no. That’s my last real memory.

However, my clothes were strewn about the apartment the next morning like someone had ripped them off of me. My legs are a little sore (which usually happens when I am on top of a guy for a long time). There is also a large white stain on my sheets that resembles semen.

By the time I woke up Mike was gone. I don’t really know what happened but I suspect the worst. Should I reach out to Mike? Just ignore it? I don’t know what to do but I feel guilt and shame.