Hi! I believe I can be of help with this issue.
I can imagine how frustrating this situation must be for you. It sounds as though you're ready to taper off from the sertraline and try being drug free. This is a good goal. The best way to do this is indeed to taper off. Sertraline is an SSRI and it is not wise to just stop cold turkey. Tapering off is the best way.
And it's best to do this supervised by your doctor. First, doctors don't like to be left out of the loop when patients make changes. Second, you may need to have some temporary medications if you (unlikely, but need to be discussed) have severe side effects of withdrawal. So, my recommendations here are based on you discussing them with your doctor, okay?
The dosage of sertraline you are taking is rather low. So that is good for your tapering off intention. The half life of sertraline is about a day to a day and a quarter depending on a person's size and metabolism. That means that it leaves your system half-way in about a day. So, start with your doctor by getting 25 mg tablets and starting to divide your dosages in the day that way. After a couple of days you'll go down to 25 mg a day. Then after a few days you'll see how you're doing. If fine, you'll start skipping one day's 25 mg half dose. Meaning, take it every other day for 4 days or so. You'll decide if to slow down the process if there are withdrawal symptoms. Monitor how you're doing. If you're not doing worse, then go down every third day for 9 days. See how you're doing. After that, discontinue completely. That is a standard tapering process for SSRIs to discuss with your doctor.
Okay, I wish you the very best!