Confused....pregnant or not?

We've been TTC for 10 months with no joy, my periods are very regular, I have a 35 day cycle and my period lasts for 5 days, I ovulate around day 20 of my cycle and always experience ovulation pains, about 4 days before AF is due i get cramping and sore breasts along with a little moodyness, I have 2 children already and concieved within 2 months on both, my last period was May 9 which was a normal 5 day period, then about a week later i started getting quite a bit of cramping which felt like ovulation cramps but was at least 12 days early, then a week later i started spotting, very light pale red/pink which turned brown after a few days, this lasted 6 days and was on and off, since then there has been nothing, my period was due 3 days ago but i haven't had any of my usual pms symptoms, no cramping nothing, I took a pregnancy test yesterday but it was negative......could I still be pregnant?? i'm very confused ?? anyone else experienced anything similar? any info would be very much appreciated