I'm a bit worried because I had an Eco ECG TMT and some blood tests done about a month ago, and everything came back normal. But now, for the past two days, I've been having this pain in my left chest, especially when I'm trying to sleep. It's hard to get comfortable, and breathing seems to make it worse when I'm lying down. Any idea why this is happening if all my tests were normal? Could you suggest any painkillers that might help?

See a specialist for accurate diagnosis and targeted treatment.