Talk to Gynecologist on Gynecologist

We are trying to concieve...from last month...almsot 10-14 days before my periods i started to fell cramps and nausea a lot...n then perids came Same in this month em having cramps nd nausea ...why em having these symptoms?? Before ttc em having nothing like these...i feel nevr nausea nor cramps Why em feeling nausea almst all times?? And then periods come