If you really are extremely backed up, and laxatives/diet fail to shift it, then that may become an option, although they will likely try some appropriate laxatives in the first instance. Definitely worth a trip to the GP either way, this really needs sorting (and if this approach doesn't work, other diagnoses may need to be considered).
My main advice though is to not worry about what people on the internet has said, even those here with medical training haven't assessed you clinically/examined you. Even if something has taken a few trips to the GP, it is still worth reattending, GPs often use time and reappointments to follow patients up and to clarify a diagnosis, so it would be an appropriate thing to do.
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