I'm only 16 years old and this has just happened yesterday. So last week I went on a date with the girl that I'm currently dating. On that date we only hooked up and nothing else. After that date I just felt like I had no sexual urges or anything, I didn't feel the need to watch porn or masturbate. I usually masturbate once a day, every day but for the week after the date I just felt no need to. Then comes the weekend and I invite her over. We start making out and we want to go farther but the whole time my penis just wouldn't become erect. She said I could try watching some porn to get hard, so I tried that while masturbating but nothing happened. My penis still stayed flaccid. Then, we start making out and I'm masturbating at the same time trying to get it fully erect but the most I can do is get it 4/10. After that we move to my bed and she starts giving me oral on my semi-erect penis but it just stayed the same. For some reason, I couldn't get it harder. So we just decide to give up and just watch some TV. After she leaves I was a bit in shock because I was confused as to why I couldn't become fully erect, so I started masturbating to try and get an erection like I easily could a week ago but it was just taking forever. I've never had any trouble with getting an erection before, and now i feel as if there's something wrong with me. I really don't know what could be causing this and I would greatly appreciate if someone could give me some advice.

I don't know if this has anything to do with it but in the past two weeks I've had to stop playing volleyball and exercising because I sprained my ankle. This loss of exercise has also led to me eating a lot less than I normally did.