Ready to throw the towel in

I just got back from the pediatrician. Sam broke out in a HORRIBLE rash three days ago and it has progressivly gotten worse. I have pictures of it that I was going to post, but I don't feel like posting those anymore, as the nature of the illness has become way more serious than planned.
Sam has Fifth's disease. Yeah..what the heck is that. It is a virus that causes a severe rash. You get it once, and never get it again. No big deal. Once the rash is visible, you aren't contagious anymore. Big relief, we didn't infect anyone...we were all home at the time he was contagious.
However, as we were leaving the office, the pediatrition said she felt like she needed to ask me something. She asked me if I know anyone in the first trimester of pregnancy. I said "that would be me." She then told me to sit down.
She proceded to tell me that if I haven't had Fifth's disease before (which I really don't think I have, and my mom doesn't recall me having it), then it can be INCREDIBLY harmful to the forming baby inside of me. It is quite serious.
So, I have an appt. with the OB tomorrow and we are going to do all sorts of tests, probably followed by more tests...and maybe an untrasound. The odds seem against me, but I just pray that the baby is o.k., and will continue to form in the right way. We just don't know at this point. I just want to have a nervous breakdown right here, right now. But because I am me, I won't...why bother, it changes nothing. I know the Lord has His hand in all of it, that should be enough. I will go to the gym, cook dinner, get the kids to bed, and go through the motions. What more is there to do. I am scared.