Don't worry. Your resistence with get strong. Besides, moms are not allowed to be sick. Didn't you know that?
Really, you will build up immunity to all those little germs that are doing you in now. My babies are 15 months apart and when they both started preschool, I felt like crap 99% of the time. Now, one is in Kindergarten and the other in preschool still and I can get puked on and it not phase me (virus-wise).
Take care, disinfect your house, wash hands, buy stock in Kleenex and hold on.