The medications you are taking is safe, some are supportive and others are decreasing the contractions of the uterus
. Nothing is mentioned so far that it could affect the baby in hazardous ways.
When early pregnancy
is feared of, usually we ask the patient to take it easy as far as her activities and physical efforts is concerned. I mean there is no need for the total bed rest
as it has long bed rest with pregnancy has its own risk.. I think short trail trip is OK