The frequency of urination and waking in the middle of the night can be a urinary tract infection, or something like NGU, which is an infection in the urethra. This can be caused by unprotected oral, sometimes by normal mouth bacteria, or other bacteria like strep, if she had strep throat.
Was the itching only external? That could have been anxiety or from shaving.
Tiny bumps on your penis ridge are probably pearly penile papules. Totally normal. Have a doctor check it out to be sure, but I'm sure it's nothing to worry about.
I'd definitely get checked for NGU and a urinary tract infection (not related to sexual activity).