Just bottomed for the first time and now Im embarassed.

I have been coming to terms with the fact that im a bottom even though i have a more masculine personality. Anyway, a guy i like came over tonight and we started geting things going orally when he said he wanted to top me. I had never bottomed before but i do use a medium sized plastic dildo so i figured it wouldnt be a problem taking him since hes a fairly normal size but when i took him it was really painful and too fast. We used plenty of lube and once we slowed way down it didnt hurt bad but didnt feel great. So heres the cake... I wasnt prepared to bottom at all and I got away with it the first time even though there was pain. There was no mess and it was great. Well, afterwards we decide to cuddle and eventually were back at it and he says he wants to do me again, so without thinking, i mount him and start and he stops me and goes "get up slowly" and i have no idea why and when i get up its fine but there is a piece of shit on his dick and I was horrified so i immediately grabbed it off of him and we went to the shower and cleaned up. We still made out for a bit in the shower and then sat and talked a little akwardly and he finally left. I cant tell if he was completely turned off by it and just tried to smooth things over before leaving. I know all the ins and outs of bottoming, I just wasnt prepared. I know it wouldnt bother me that much if it were the other way around but I havent had this happen to me. Has anyone else experienced this situation with a new partner, and if so, did the guy get freaked by it or is this common? I know long time couples deal with it eventually, but i just started seeing this guy and its the first time ive bottomed.