Having trouble keeping my penis erect.

So a few days back I masturbated quite intensely to porn for two days back to back and ever since that night I'm having trouble keeping my penis erect.

This has never happened to me before. NEVER. I started masturbating from quite a young age and have never had this problem before. I've masturbated and went on to have sexual intercourse two or three hours later, and even then I didn't have this problem. I would be erect for quite a long time. But after those two consecutive days of intense masturbation I had sex and I went limp in the middle of it and ejaculated early. I tried masturbating the next day but the feeling wasn't the same as before. I could feel losing my intensity at points I stopped masturbating.

I'm very concerned and worried about my condition here. I'm having thoughts like losing my sexual urge, erectile dysfunction, etc. Please shed some light into the matter and help me out. I'll be forever grateful.

Thank you.