I was on Zoloft for about 9.5 months. I had some problems when I started it, but most of them went away eventually. I was on 100mg after the first couple months and things were fine for a really long time. Then I missed about 4 days and it was like my body reset itself. I began to experience the pain of those first few months all over again, but worse. Everything, from the horribly vivid dreams (so much so that sometimes I was confused about what was actual reality) to mild memory loss, weight gain to horrible headaches and sleepiness, disordered eating to suicidal ideations. It was ridiculous and I couldn't stand it anymore, so I talked to my doctor and opted to get off of it slowly.
Your medicine shouldn't make you feel worse ON it than you do OFF it. Talk to your doctor and try a different SSRI. Zoloft is clearly not for you. For a time it really helped me out but there's no way I would ever recommend it to anyone else after the trouble I ended up having. I've had a couple of friends have success with it, but I also have a friend who was on it and ended up attempting suicide because it just didn't mix with her brain properly. It ended up that she had been misdiagnosed.
You're at 150. You've gone for 7 months. You've clearly tried. Now is the time to ween off of it (do it slowly so you don't get bad withdrawal issues like weakness, headaches, dizziness, etc) and make sure you make a plan with your doctor. Tell him/her you NEED to try something new because Zoloft is not working for you. I've been too scared to start another medication because of my experience with Zoloft even though I know I need to; don't make my mistake. Talk to your doctor about the side effects you don't like and can't live with and see if you can't find something that actually helps your depression/anxiety/OCD. I'm pulling for you.