Vomit that it can empty out my stomach in secs

7weeks & 3days, here starts my morning sickness🤢 And I've been so sick pass 5days. Jus fever, flu, cough, phglem, you name it. Apparently immunity is compromised thru out pregnancy so that our body doesn't hurt our child thinkin to be foreign species. Doesn't that mean thru out pregnancy goin to be unwell ? I can hardly do anything so sick