I'm not even 12 weeks yet and the heartburn is awful, but that's all I've had. I was terrified of morning sickness as I have a major phobia of vomiting so I'll happily take the heartburn!
I went to the pharmacy yesterday and bought 2x 500ml bottles of own brand gaviscon (mint flavour, cannot stomach the aniseed any more!) and about 4 tonnes of Rennie. I'm quite well known in the pharmacy and the woman serving just asked if congratulations were in order 
The only thing I'm finding that is helping is eating. If foods going down, acid can't be coming up!