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

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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?!