Hi Autumn 16
Yes I too have these feelings, almost like someone has an electric drill in my stomach. I also have hot sweats, freezing cold spells, low mood, dizziness, weeping and anxiety.
I agree with Dangermouse, I think it's hormone related.
The only advice I can give you is to go with it and accept it. Analysing will get you nowhere except back in your head. It's easier said than done I know because it's so frightening. But I can assure you after analysing the menopause for many, many hours, it's still happening and I've changed nothing and wasted time. Good luck with your gyny.
Keep posting at it can really help.