Tahaarat

Doubting whether one had a wet dream or not

Q: I am a female, after waking up in the morning sometimes I am very doubtful whether I had a wet dream or not. I am certain that no orgasm took place. The vaginal discharge is white or clear as regular discharge or sometimes clear water as sweat in very little quantity as moisture of organs. The discharge does not even come out of the labia majoria. It is inside only. So do I need to do ghusl as I am doubtful of whether I had wet dream or not? 

Washing oneself after istibraa

Q: When I first started doing istibraa after going toilet about 2 years ago, I never used to do it properly for about the first 8 months. I used to go to the toilet and without waiting for all the urine drops to come out I used to wash myself. At that time I didn't even realise that I had to wait for all the urine drops to come out. After washing myself I would then wrap some toilet paper around my private part and after about half an hour I used to take out the toilet paper but I never used to wash myself again. I didn't realise that I had to wash myself again.

My question is, do I have to make qadha of all my salaahs in this period of about 8 months? I also was imam for many salaahs.