I just stated birth control this month. I'm on the last 4 days of the cylce and I was feeling dizzy, especially getting up from bed. Today I got my period and had a quarter sized blood clot with some white tissue looking areas. It's scary. I have no idea if it's related or what it could be. Does anyone have anything related? I'm seeing my Dr this week just in case. I'm 24 and have never had kids but prior to this last year that I was off birth control, I was on the pills for about 9 year. Thanks.