If I don't know if I'm pregnant or not but I'm still taking my birth control so in case I'm not pregnant I don't get pregnant how long can I take the birth control before.it starts affecting the baby if I am. I cannot go to take a pregnancy test for another two weeks

You know the pill isn't 100% effective.

Just wait until you get the test in two weeks... or go to your drug store and buy a HPT and do it first thing in the morning.

For about a month I been having symptoms such as minor headaches, back and side aches, moodiness, etc. Other signs that would leaf be to believe I might be pregnant so I have taken 3 pregnancy tests but they all came back negative. What could these symptoms also be ?

Have you missed your period?