Health Concern

For the past 21 hours I been experiencing extreme exhaustion, and dizziness, I also have been feeling my heart beat every so often In my neck. It only feels better when I close my eyes and sleep, however I have slept for 12 hours last night, and I wake up and still feel the same. I can feel myself also being emotional all the sudden, wanting to cry, I feel down and depressed I am feeling this way Instead of being active and doing something. I have ate, I have drank water, one minute I feel fine the next I’m back down again.