Hello, I have a really irregular period and I have been off birth control for awhile, usually my period came around the 10 through 12, and I get brown spotting normally before hand that's how I know I'm going to get my period, however last month was really stressful and I can't remember when I got my period and now it's the 21 of this month and I am really late! I have been taking pregnancy test like crazy and they all say negative, except one came up faint, weird but the rest negative, and I have been h!! Could I be pregnant or what? I'm not that stressed out or anything either... I would go get a blood sample done but they are so expensive and I am scared of disappointment in a way to... advicee??