Why my taste buds off ?

Over the months I been really craving stupid foods

I craved jam doughnuts and if I get different ones I’d start crying for no reason 

Then I havnt had ice cream since I was 16 now I’m 23 and the craving for iced was driving me insane I’d have ice cream after iced cream 

But now every time I eat savoury food if feel sick with 0 

appetite

I’m not pregnant 

I feel sick 2 days before and 2 days after my overlation and when I’m on my period I’d clot for the day then spot for 4 days

If I don’t eat every 4 hours I start to feel weak and shakes 

What’s happening 

There might be an underlying cause to the symptoms you are presenting. Have you been checked for diabetes? I don’t mean just Hyperglycemia, but also for hypoglycemia as well.