Welcome to HealingWell. I am sorry you are having the medication management issues. It is very common and if you type Paxil into the search feature above you will find many threads on this drug.
We are not professionals and we cannot tell you how long it takes on the drugs to completely leave your body. Each person is different.
Have you tried and alternative to using the drugs? Some people do well on therapy etc. ?
Please do advocate for yourself when talking with your Doctor.
I wish you peace.