Fucking and cumming

I don't know who to turn to about this so I'm hoping someone on here can help. I have fucked a woman (paid for) and I'm not gay or anything but I couldn't cum and eventually my erections go away. Today I went to a fs massage parlor had sex but had a hard time coming. I had to jack it and then stick it in to cum. How embarrassing. What's wrong with me? I masterbate alot but only because I have a hard time finding a gf also the fact I have no money to really spend on her plus being a college student. Why do I have a hard time coming? I'm scared that when the gf comes along one day I'm going to have a hard time Cummings again. Not to knock anyone but I hope to put this paying for sex behind me and finding a girl. Any advice? Thanks