Interesting thing going here, need opinions

Hi, almost 16 yo male here . PMO'd often for 3 years. I had a few streaks before but relapsed, not with porn . I have quitted it since December . I haven't had sex yet but I have been in suspicion of PIED because I can get hard without porn, just by imagination or some pictures of bikini models on the internet but most of the times it is lets say 80 or 70% hard Every erection afterwards in that day becomes weaker as if I get exhausted or sth. Havent had the full erections like my morning wood a year ago. I don't know if what I have is a problem but anyways. I am currently on day 39 of the 90 days reboot and I have no problem with watching porn . The only bad thing is that I am impatient but I am trying to cope with it .I have been noticing some changes. I started getting sometimes random erections but again they are around 70~80 % hard. Even from a 2 sec touch in the bus from some girls butt I got such erection. I have noticed that if I get an erection throughout the day, without cumming of course, the next erections, if I get, are less hard and they fade away after some time. I have also noticed that I have morning wood almost every morning but because maybe of my sleep shifts I get it earlier than I used to. I mean, I get up at 6;30 but when I go to the toilet at 5;00 am then I have this wood. What do you think guys ? Do I have a problem? I am sticking to the 90 days no matter what ! Never porn again but thinking about masturbating after the 90 days.