What things to avoid/ What things to do after conceiving?!

Does anyone know what things should be avoided or to be done during two weeks wait period from the the date of conception until the  the first day ofmissed period?! i mean beside alcohol, smoke and the stuff we all know.
 I have cold and I am trying to get pregnant, I have 2 weeks from 2 nights ago to know if I am pregnant or not. During this time, if you get sick or something can we take any pain killer or cold medicine?!