So I just started Apri 28 day birth control pills and I was supposed to start my period the 24th but it's been six days and I haven't gotten it though I keep getting cramps and having mood swings as I would if I was about to start my period. I've only had sex 3 times since I started and each time was with s condom. It's started to cause me anxiety and I just want to know if this is normal when just start birth control.