Hi, I had difficulty in sleeping since last night. I
i went through the details. It would have been better if you had mentioned age and previous medical condition. Based on the details provided, it's difficult to predict the specific cause of sleeplessness, however there are two possible conditions I would be concerned about - hyperacidity and heart ailment.
I'd suggest starting antacid / proton pump inhibitor available over the counter. If it doesn't get better, you need to visit a doctor for evaluation.
Hope this helps. Let me know if you need clarifications.