Missed periods definitely NOT pregnant

Alright ladies.

I haven’t had my period since December. I did stop briefly stop taking birth control from December 5th-January 27th HOWEVER, I did not have ANY sex during that time(or at all in the past 5 months) so I am pretty confident I’m not pregnant.

My problem is that I don’t know why I’m missing my period. It feels like my period should be here because I’m cramping, my ovaries literally feel like they ache(which is new), and I’m having stomach issues/acne that all come with my normal period but I’ve had nothing but symptoms for the past two weeks and NO period.

Should I be continue to be worried? Is this normal and just happening because I went off and then got back on my birth control?