I have a nine month old son who I am still breastfeeding. I got my first period after being pregnant on the 1st of December and then again on the 1st of January. During December I had unprotected sex and I haven't gotten my period for February. My teeth have been sore and I had cramps for about a week then they stops, between my hip bones is swollen and feels hard (which is exactly what happened last time I feel pregnant) I've taken two pregnancy test and they both came back negative. Is it possible that the fact I'm still breastfeeding might be effecting the tests?? My cycle before I was pregnant was 4wks as well