Are you taking birth control pills? I'm having a hard time understanding your post since it says so many different things.
First off, if you are on birth control, you are 99% surely not pregnant. Secondly, you can have break-thru bleeding while on birth control. Generic pills are still birth control, they just cost less.
When or if your period is late and you are concerned about pregnancy, take a test. Two weeks before your period starts is far too early for any symptoms of pregnancy or even to have a miscarriage (because you would only be JUST NOW ovulating if you weren't on birth control).