Hi a little advice please ...

Neveen • Married to my best friend 🥰mommy of 6 gorgeous kids 💙💗💙💙👼🏻💗💙4 gorgeous boys and 2 gorgeous girls.. and 1 miscarriage 💝had my boy early 😍September 26

I’m 22 weeks pregnant and I have been feeling very faintish .....even though I eat and drink water ....but can’t seem to keep my self up standing or sitting.... very fast heart beating.....I did blood tests everything is good,,,, what can this be? Or how can I get rid of this??