TTC not sure what to do to help

lyss

I’ve been TTC for about 2 months. The only symptoms I have are very tender/sensitive nipples, the areola do seem a bit darker some days, and a day or two ago I had some period like cramping but no blood. It’s really hard to distinguish what is PMS and what is possible pregnancy. I took a .88 cent test yesterday from Walmart that was negative. Does anyone have any insight or suggestions?