Hello and welcome to HCM.
Thank you for your query.
Lack of a natural bowel movement for 4 days or more is not a sign to ignore. It is best to visit your doctor at the earliest and diagnose or rule out all possible causes of constipation
before assuming it to pregnancy-related constipation (as it is too early for constipation to present, even if you are pregnant).
An erect and supine abdominal x-ray
should help in initial diagnosis. Please visit your doctor at the earliest. Please also discuss all details about your diet and your digestive history.
I hope I have succeeded in answering your questions, you could write back to me anytime for further clarifications.