Two day period?

So I am quite confused and hoping someone can help. I had my IUD removed end of August bc my husband and I are TTC our second child. The paat two weeks I have been nauseous after eating, headaches, tired and sore breast. I took a hpt but it was negative. We had sex every time I ovulate according to the test. Thursday I had a light brown discharge when I wiped. Friday and saturday I bled lightly like a period and today it is gone. Any suggestions or advice?