My heartburn increased really badly from about 30 weeks, so far I haven't found anything that really helps it either!
My movements really slowed down as well. I only get rolls now as opposed to kicks. But as bub gets bigger, the rolls are worse than the kicks. At around 30 weeks bub turned from lying across my stomach to head down, and I didn't feel any movements for 4 days. I saw my doctor and he said there's definitely movements, I just didn't notice them as I was used to the kicking. I'm now used to the rolls and know where bub is most of the time.