My husband and I have been trying to conceive. A week after I ovulated I experienced light implantation bleeding that didn't last more than 2 days. A few days before my period should have come I experienced about 5 days of very light brown spotting. The brown spotting has stopped and my period is about a day or two late. I took a PT today (which should not be too early) and it is negative. Could I still be pregnant or is there something else wrong?