i cant sustain a full erection maybe only 70 percent hard, does stand up straight though. i do not wake up in the morning with a erection (is that normal). i am not under any stress or ever smoked. I used to be fine

try eating pancakes b4 u go to bed make sure to use lots of syrup

maybe you should give the little guy some time off, take your mind off the problem and see if it goes back to normal from A) having time to itself and B) less stress about it to begin with.

Erection of penis during sleep in NOT normal. I, being a doctor (Homoeopathic), strongly advise you to consult a doctor immediately since you are not having full erection. How many times do you masturbate in a day, if you have the habit of doing it. Some people say that masturbation has ill effects on erection and dysfunction occurs if you practise it. But it is wrong. Of course excessive masturbation may cause erectile dysfunction.
Don't worry.

the only thing you can really do is talk to your doctor

what exaclty is your question though?