Tanya, I could have written your post!
I had my daughter 2 1/2 years ago, and I have also had nothing but problems since. Major gas, bloating, pressure and constipation. Oh yes, and the low back pain. Add with that horrible hot flashes and pain when I actually DO go! I am having my colonoscopy next week; everything else has been ruled out. I saw my gyn last week, and he did a full pelvic floor workup to see if I had damaged something by pushing so hard (3 hours, 9lb baby), but nope, nothing other than just a little bit of weakness.
I am miserable, 24/7. I don't have any advice; just wanted to let you know that you are NOT alone! I was told that structurally, sometimes women never go back to "normal" after having a baby.
Looks like you and I are part of that lucky group.
Take care, and let me know if you discover the magic secret to feeling better!