New help! :( driving myself nuts

Kc
So I stopped taken my birth control back in July because I was suppose to get the Marina. Well me and my fiancé went to Oklahoma for two weeks for his work and I had my period around I want to say the 21 st and it last about 4ish days, that was the last time I had my period. I've tested a bunch and they've all came out negative :(. But lately I've been really dizzy, nauseous and I've had really no energy. I've just chalked it up to my nerves and stress. I have bipolar/depression/anxiety so I figured maybe that was the problem so how. I'm starting to worry it could be early menopause even tho I'm only 25 my mom started hers in her 20s. I've been trying to get into my doctors to see what's going on. I'm just really nervous they are going to tell me I can't have kids or something. If anyone has any similar stories or advice please share!!! It'd help right now!