Noticed Pressure In Bladder And Frequent Urination

Hi there. A few weeks ago I had pressure in the bladder, which made me feel like i needed to urinate frequently. It wasn't a UTI and seemed to pass on it's own. (this seems to happen monthly? Is it an ovulation symptom?) Anyway, i've since been burping A LOT, especially after I eat. I've just been very gassy in general, with occasional severe stomach cramps, just below the ribcage. I've now also got blood in my stool (bright red blood. I thought i'd started my period). Any advice? I will go to the doctor, but I have high anxiety and wondered if I was being a hypochondriac.