Hi Linda, and welcome!
The sensation of symptoms alternating is common in fibro, and I think it's due to symptom areas flaring independently of one another (so accidentally alternating), but also them maybe being connected, so one setting the next off.
So maybe your bladder and bowel symptoms are either connected to the chest and stomach symptoms or connected to your treatment of them. In your case they are moving further down the GI tract, so it doesn't seem completely unlikely that there is a connection.
Chest/heart and stomach/gut can for instance be connected, e.g. via Roemheld, e.g. wind.
I think of it as spinning plates, in my case "100" for the amount of symptoms and also for the amount of treatments I use per day (probably more, unless I group them of course).
Aside from connections chest may be costochondritis or heart, stomach may be hypo- or hyperacidity, bladder can be UTI, IC, OAB and PBS/BPS and bowels can be "IBS" (D, C or A). All of these are things I have to constantly watch for (except UTI and IC): Back exercises, sports, lipid supps, heart checks, eliminating food & drink triggers and for my Painful Bladder Syndrome / Bladder Pain Syndrome (and OverActive Bladder) increasing the low serotonin to relax those involuntary muscles using the neurotransmitter GABA....
That's after getting them often checked with orthopedists, cardiologists, allergists, GI and urologist.
Quite a few of us have painful bladder problems, but they do vary a lot in their exact type. Mine hurts while trying to pee, if my serotonin (& GABA) are low that pain can go up to a 5 or 6 (that's a quick shout for pain), but with GABA balanced I can get it down to 0-1.
