Hello
A have a heart condition which effects me more during pregnancy.
Every day I have episodes of palpitations which make me feel very close to passing out. This can occur any number if times throughout the day and last about 2-4 minutes a time.
There seems to be little trigger apart from the heat or if I move too quickly.
I have been offered medication to control some of this.
Here lies the problem...
Both my previous babies have experienced a slowing of growth from 34 weeks.
Dd (c section) at term weighed 5lbs
Ds (c section) 37 weeks due to breech and cord wrapped around neck 5.2lb.
Both heathy but small.
My doctors thinks I'm just someone who carries small and suggested closer monitoring from 32 weeks again in this pregnancy.
However the heart drugs pose a risk of premature birth and low birth weight.
With my history of low birth weigh anyway I'm concerned.
So now I'm stumped. Do I look after my own health first or risk continued palpitations and stress to my heart and potentially place dc3 in an difficult position? 
I'm 20 weeks now and from past experience the palpitations will only get worse at I progress.
Sorry for essay 