Hi I just wanted to let you know that I also have a horrible phobia of spiders, and also centipedes. Although strangely enough I'm not scared of pet tarantulas. But anyways I'm absolutely terrified by them. There's been times I came and slept on the couch in the living room because there's one in my room. I'm 24 years old, but I see a little spider and start freaking out, I've even been brought to tears because of them. I feel like an idiot, like I'm way to old to be scared of something like that.
I was on Zoloft quite awhile ago for depression. I remember tht it helped, but it left me with an empty feeling all the time. I think I ended up switching to Welbutrin after that, but that was for depression so I don't know if it helps for OCD. But other then the empty feeling, I don't remember any other bad side effects. And just because that's the effect I got doesn't mean you will anyways. I hope it works well for you, but if not there are many other meds out there. Hope you are feeling better.