I've been fasting for 3 months and feel great but my cholesterol went up. Should I be worried?

Is it normal to feel colder than usual when fasting? I'm always freezing now.

I feel dizzy when I stand up during my fast. Is this dangerous or normal?

My hair started falling out after 3 months of fasting. Has this happened to anyone else?

I'm 58 and my metabolism feels like it's completely stopped. Is it too late for fasting to work for me?

I have PCOS and haven't had a period in 4 months since starting fasting. Should I stop?