Pregnant? Good prenatal? Calm me down?

Last period started April 22nd. No birth control, no condoms. Just the good ol’ pull out method.

Period is 12 days late according to eve. (Yes, I act like eve is a person lol) -

Bled minimally yesterday, noticed during sex/ and when wiping yesterday night.

Nothing today. (Blood wise)

Started testing Sunday, once a day- everything is coming back negative.

Doctor wants me to come in, in 2 weeks if my period doesn’t come. To test again. (Which I’ll probably just test at home?)

He wants me to start a prenatal, just in case.

Picked up two bottles of “Rainbow Light” - anyone else like this brand? Suggest another?

I’m just stressing out. Pretty much because I want to know if I’m pregnant or not. However, I know stress can make your period late. My mind has just been going 1000000 miles an hour for the last few days. Sorry for rambling. Thanks for reading.