no period

So i’m on my first month of birth control pills. I had the IUD before and i had sex before getting the iud out and ever since all unprotected. I had withdrawl bleeding after i got the iud out i’m now on my last sugar pill of my pack and still no sign of period. I’m always tired nauseous dizzy my blood pressure dropped a or of cm headaches negative tests it seems like there could be a line starting but idk. Helppppp please!!