Strep B positive and anxiety

I did so well with my anxiety once I got to the second tri. Now it feels like everything is going wrong. First baby girl was found to have a VSD on her anatomy scan. It thankfully closed in utero. Since I got to the third tri my anxiety has been out of control and I feel jinxed. I have been extremely itchy and was tested for choleostasis last week which came back negative. (Debating asking for a recheck because I am still itchy) Now today I just got a strep b positive bloodwork result. And I’m allergic to penicillin. I called the OB and they said it’s fine and I’ll just take clindamycin. But my anxiety is spiraling—will my labor last long enough to get the two doses since it’s my second? What questions should I be asking of the provider? I legitimately can’t stop panicking. I am so worried that this baby isn’t going to make it and I don’t know how I’m going to cope with my anxiety this high for ~3 more weeks. Please send words of comfort, anecdotes, etc. I am so upset and worried.