Erectile Dysfunction, messing with my head...

It had been over 6 months since I had any sexual activity, so I got a lady off of craigslist, she was very pretty and nice, but all thru the bj, I couldnt even get hard, and after she left I continued solo and I was able to jerk off, and it wasn't her fault, she was a sexy, curvy pink haired babe. Please no eww a hooker or anything like that, those steretypes about them are mostly false but it made me think, if I couldn't get hard for her, which was an already guaranteed score, how would I handle on a real hook up. Does anyone have any advice that could help me?