Thank you for your query.
Do not panic.
The fetus gains the maximum weight in the last trimester.So all is not lost yet.
Take high calorie diet,plenty of vegetables and fruits.
Take plenty of fluids and rest.
Take your normal quota of Vitamins
,iron and calcium.
Stay happy and have a regular walk.
If you have any further queries you are free to consult me.Hope this answers your query.Wishing your child a speedy recovery.Have a nice day.