Sex problem due to prone masturbation?

I know this is not a popular subject and many people dont believe in prone masturbation causing problems in the bedroom, but believe me, it has caused me to go through hell and thats not me exagerating.. I am 18, and ever since about 5 i have been masturbation face down on a matress or carpet (so a lot of friction) it was a self discovered way. I didn't believe there was anything wrong with it and hell i didnt even know what i was doing it just felt good. Long story short i had my first (really have no idea how lol) sexual accounter! Woohoo! Couple of anxieties about if my things to small (isnt) and i was a bit shy but didnt show it. This was just before my 18th birthday and i had sex, got an erection fine but did not manage to finish at all.

In fact both of us didn't we eneded up giving up. I actually lost my erection a few times i think because of the lack of pleasure i got because i could not feel anything down there at all! When she gave me a blowjob it felt good but not good enough to ejaculate! . Aftetr a couple more tries later that month all ending the same way, i was devastated. The fourth time we tried, well...looks like i got a new problem. This one was unexpected. I could not get it up. I got my penis hard once or twice but it didnt stay up!!

I rember this day clearly because it was the royal wedding, and it haunts me quite a bit I was scared of not being able to finish in her and i thought it may be down to performance anxiety.