I had a lot of bloating in my early pregnancy. Low back pain can be a sign of miscarriage, though. Maybe worth a call to your OB.
Yup, unfortunately. The belly might be bloating, especially if you're gassy. I'm showing (twelve weeks) but I've gone down a lot in bump size sincey bloating went away. I have preexisting back problems that are just made worse by being pregnant. I do some bending at the waist and letting gravity help with my back (but that's starting to become difficult because of my belly), and I've started sitting on my chair backwards, with the back against my chest and my legs straddling the seat. It seems to help a bit (although it kind of hurts my boobs, but not as much as my back) and it won't last for long, again because of my belly, but if you have an armless chair like mine, maybe give that a try? I know some floor exercises that help my back too, but they're not helping as much anymore.