Mom driving me crazy

I never got on with my mom although in the last few years I managed to somehow tolerate her difficult personality. Since I got pregnant I argue with her a lot more and when we met over the summer ( I live in a different country) we fought a ton.

She wants to come and visit me before the baby comes which is nice of her, but she is not independent and even incapable of booking her own ticket. I’m trying to help her but she is driving me crazy, not trusting my instructions and dragging the ticket booking over days wasting my time. We argued fiercely twice over the phone, and I get sooo stressed, sweating, shouting even had a nose bleed.

I don’t really want to have to spend a few days with her on my own anymore ( my partner will be away) and worried about hurting the baby. If I tell her not to come she’ll make a huge drama.

What can I do?