Alright so... I've been a porn addict and stopped watching it for a few weeks ago, that seems to be fine but I am masturbating... Before I used to fap 3 times a day, and watch all sorts of weird shit... and now.. when I was gonna have sex with my girlfriend, I legit could not get it hard. I wasn't horny, or aroused by her.... I think something is wrong with me
Yes watching a lot of porn can give you ED. It gets better with time spent not watching porn. Or you might be in a flatline. You can find out more about that at http://yourbrainonporn.com
The short answer - YES. I went through the exact same thing you described. The sole reason I went on the noFap journey was to reboot myself to sexual norm. What you are experiencing is called Porn Induced Erectile Dysfuction (PIED) There are many posts on noFap about it.