I am 26 and pregnant again 4 th time first one i carried full term and 2 i miscarried and now pregnant again i am only 4 weeks and what stuff can i do?

See doc: Have you had a work up for recurrent miscarriage? If not, there are some tests which might prove helpful to determine the reason for your losses. Depending on the reasons for loss, there are sometimes meds we can use to try to prevent another loss. If a reason is not found we are often unable to do anything to change your risk. See your doc and best wishes to you!