Missed periods

So my period was supposed to start yesterday, and I’m on birth control. I only started taking it 3 months ago. Last month my period was super weird, like instead of blood it was like a pink discharge. So I got super freaked out that I was knocked up. Took a test and it was negative. I haven’t had intercourse since then but have messed around with my bf so it would be magic if I was pregnant. I also only recently became sexually active so I only recently started tracking my menstrual cycle (a little before I started bc) I’m pretty sure my cycle should be about 34 days but my doctor told me that with they way my period is I would probably not have one at all. Is three months too soon to see my period go away completely? I kinda don’t like not having one, cus then I’m kinda worried for in the future I’ll get pregnant and not know or just constantly be worried that I am. Should I find a different form of birth control. I take the pill right now.