nausea mid cycle?

So my husband and I just started TTC, so I haven't gotten a good feel for when I ovulate and all that. I know technically it's usually 2 weeks after your period. We started doing the BD immediately after my period ended on the 6th and starting yesterday I have felt incredibly nauseous and somewhat sensitive to smells. This would be my second pregnancy, so I remember with my first one I didn't even realize I was pregnant until about 6 1/2 weeks because my cycles had been irregular in the past. But I definitely don't remember getting sick until around 4 weeks. According to most of my apps this is the time I should be ovulating so to be pregnant AND feeling symptoms seems highly unlikely.