Thanks for the query.
Some amount of constipation
is common in pregnancy
With your doctor's advice you can take laxative syrup in the nights. And take plenty of water, fruits, vegetables etc.
Usually baby's movements will be better appreciated after 20 weeks in case of first pregnancy, In case of multi they can be felt better in 18 weeks itself.
Till you consult your doctor you take bed rest
as much as possible.