Cycle questions!

So glow app has really been on with my period of when it will start and when it will stop!

Jan 27th- Feb 1st

Feb 23rd- March 1st

March 23rd-28th

April it has the cycle as the 20th- 25th

I have not gotten my period yet.

I’ve taken two tests, both negative.

I have been nauseous, breasts have been sore, and I’ve been super tired lately!

Do you think by chance I will start my period the next week or is there a possibility I could maybe just be getting false negatives?😫