I was wondering if anyone has ever had similar symptoms to me as I feel like I'm hitting a brick wall even getting an appointment with my GP.

Some possibly useful information:

27yrs old female.

Have Lynch syndrome (genetic mutation) so have a colonoscopy and gastroscopy every 2 years. Just had them today, and both clear (yay).

For the best part of 10 years I have been getting what I have assumed is cystitis every 2-4 weeks. It only usually ever lasts for about half a day then goes by itself but it's been getting more serious in that I am regularly wetting myself now, which is of course very embarrassing. I can't track a particular thing that triggers it, but I am essentially toilet bound for half a day unless I wear incontinence underwear.

I also suffer from regular constipation (I'd say 85%+ of my bowel movements are constipated) and often feel like I haven't fully emptied my bowel after going. 

Does anyone have any advice please?

Thank you