This Saturday I went to bed at 2:30 am. I had been smoking weed and noticed I had a hard erection but was so wiped I passed out. I woke up at 7 with the same erection but it was quite painful, very hard, and cold. After 20 mins of walking around it went away. I had some groin pain for the next two days. Ever since this incident my erections are very weak and go away instantly, even my morning wood. I am worried that I may have had a priapsim and developed fibrotic tissue. Is this the case or is it something that will subside in a bit?