I get this all the time. It all started last year January 25th two days after I had my son.I came down with a nasty bladder infection that shot up to my kidneys. I almost died.Well ever since then I've had the back aches that will go to my front (under the rib cage area on both sides). I also get bad cramps, bloating, gas, burping, heartburn, acid reflux, fatigue and I alternate between constipation and diahrrea (sp?).So, you are not the only one. I've had Ultrasounds done and they couldn't find anything. I also had bloodwork done (ok there too) and urine tests (could use more water - a bit foggy). They also found small amounts of protein in my urine when I was pregnant. This is called preeclampsia. I also have high blood pressure (from being overweight and I think smoking).So, I'm a mess and you aren't alone w/ the bloody symptoms. They cause me depression and anxiety. It never goes away.