Lower mid Left chest pain. Bit better.

For last 3 days, I have been feeling a keen pain in my left chest and I can feel it at my back too while sleeping or breathing in forcefully. While sleeping I can't move my body on side. To feel better, I have to sleep on my back and can't move. today I am feeling bit better. Apart from this I don't have any issues like dizziness or breathing problems etc. I am going through some office work load and emotional feelings. I don't have any allergies, digestive problems or diagnosed with any health issues. Last weekend I was over consumed alcohol in friends party but was not dehydrated, had enough water in morning. Had proper food at regular intervals. Please let me know if you need some more details.