i am 37 wks pregnant and have been on anti-biotics four times in last five months. two of those times were quite high dosages. i have been assured that all ok for baby, so am just hoping to get through next few weeks without taking anymore anti-bs. prob now is that i feel like i am open to catching anything and everything. is there anything i can do to improve my immune system? when will my body's immune system be back to the way it was before i was preg and taking all these anti-bs?