Had a small co-op pancake for breakfast today. Min morning I started to have heartburn so I took 2 rennies. After an hour it was worse so i took 2 more. Came home and tried to lie down but couldn't get comfy - the pain had moved down a bit form my chest/upper back to my stomach. Took 2 more rennies and finally felt better around 3pm but didn't want to eat anything. By 6pm I felt absolutely fine so at 7pm I had a bit of spinach pie and some roast veg. Quite a large portion as I was hungry. Within 30 mins I was back to the same agonising chest/back stomach pain. I've been sick a couple of times but mainly at my own volition to try to feel better, I don't think it's a bug. I've taken a further 2x2 lots of rennies this evening but I'm still in a lot of pain. Packet says not to take more than 10 in 24 hours - should I? And what on earth is causing this pain?