I can't lose weight without passing out

The title basically says it all, but I need help.

My body fat is low right now, I'm trying to be on a slight deficit just to get more shredded.

Today I started my deficit, just a little under my manteinance. My blood sugar dropped harshly and I had to eat watermelon breaking my deficit.

One month ago, I passed out three times. I think it was low blood sugar. In the hospital, the doctor suspected of me having anorexia, due to my low weight. I was in front of my parents when asked and I was too embarrassed to admit it.

Last summer, I developed anorexia. Lost a lot of weight in one month. I restricted myself, I obviously didn't feel my best but I could easily eat one egg a day and keep living.

Now it seems possible.

I've read that maybe I'm developing diabetes. Maybe I've been restricting for too long. Maybe it's the amenorrhea. I'm not sure. But I really need help. I think I've just developed hypoglycemia but I need to know how to lose weight while having it.

Has someone experienced something similar? How did they manage to live with it?

I would appreciate any comments ;)!