Is anxiety ruining my relationship?

Just recentley I got diagnosed with OCD and many other anxiety disorders. My mind has always really scewed things and made me very afraid of commitment, people, and scared of myself. About a year ago I was worried that the world would end, then that thought disapated. Then I was worried that i was blasphamous and full of sin, and scared of the devil. Then that went away after a couple months, me realizing that was very irrational. Then I woke up one day, and was scared me and my boyfriend were'nt meant for eachother and our relationship is fizzling. We didnt have a major fight, we get along really well, we love eachother. My mind has just been in constant battle with the thought for over a month. It is seriously the first thing I think about when I get up in the morning, and the last thing I think about when I go to bed. It also causes me to have major diahreah :( But now that this is going on and I'm having all these problems and anxiety about it, it really makes me think. Maybe its my gut saying HOLY **** what are you doing??? Yes I will admit that when our relationship first started I was kind of skeptical because I thought I might be too much for him. But the more we hung out, the more I liked him, and the more I cared about him. I see good things in him, and he is absolutley wonderful. I wouldn't change him for the world :) But now my anxiety is making me doubt everything, and its starting to make me become detached from him and my relationship. Its so incredibly sad :( I love him, but the anxiety and obsessive thoughts are making it fizzle. My negative thoughts are killing me, because I think if we broke up, my mind would find something else to worry about. I guess I'm just hoping Im doing the rite thing. Im going to start going to a therapist once a week to talk about past traumatice exeriences, and I just started taking anxiety medicine. Am I just trying to not face reality and accept that fact the things might of just fizzled, or am I really an anxiouse wreck and once Im on meds I can be myself and hang in there for the sake of my realtionship. Im soooooooooooooooooo torn up about this. Sorry about the spelling, stupid spell check is being weird.