I have been on zoloft for 10 years since I was 13 years old. I went from 100 mg down to 75 mg about 3 weeks ok. For the first 2 weeks I felt great. Just a couple of days ago I started feeling strange sensations in my head, louder ringing in the ears, and I felt disconnected from everthing around me. i now feel like a completely different person. Why is this?