How to manage morning sickness?

28+6 with a girl. Since I got pregnant, I’ve been getting sick on and off. Repeated tonsillitis cases, the flu, sinus infects, colds, migraines. You name it. Nothing I do seems to keep my healthy long enough for a month to go by without me being sick. Anyone else been like this during their pregnancy? Anything I can do that seemed to work for you all? I’m desperate. I’m so sick of being on repeated doses of amoxicillin. I’m starting to get a reaction from taking it (breaking out in a rash on my face). Thanks in advance!