Sickness

Has anyone else been getting constantly sick no matter what they do?

My immune system before getting pregnant was low as it was if I'm around someone with a cold I somehow end up with 3 infections. Now that I'm pregnant at 12 weeks for a week I was sick on antibiotics I was alright for a week now I'm back on antibiotics for something different. Seems I can't go to a family dinner or even work without getting sick as soon as coming into contact with anyone who carries some sort of illness. I do take 2 prenatal vitamins every morning. Anyone else the same? Or have suggestions on how to make this not so often besides staying in my house constantly haha?