Me and my husband are trying to get pregnant and have been off the pill for 2-3 weeks, but prior to getting off the pill I did not take it regularly this last month (Dec.) and had missed a whole week of even taking it. During that time, me and my husband did not use protection. About 5 to 6 weeks ago I had a brown discharge that was light instead of a period and about 13 days ago I started a short period that only lasted 2 1/2 days. I've taken pregnancy test and all are negative. Is the irregular periods due to being off birth control/ not taking regularly? Or could I actually be pregnant? I was only on birth control for 2 months and prior to that I had an IUD.