Help please

Che

My Fiancé and I are trying to conceive. We’ve started last month at the end of my cycle which was the 12th of May!

I’ve had severe pelvic pain and nausea since we have started our journey (on the 12th). my cycle started on the 1st of this month, however it only lasted Only 2 days normally it will last about 4/5 days. I took 3 pregnancy test all were NEGATIVE . Now I’m spotting and nauseous. Is this normal? Should I be worried?