u could have a bug theres alot off them around this time of yr or u could have an infection placing a seat in the shower will allow u to rest an cud help perk u up a bit ur heart beat will/could have increased because ur worryn bout not being able to sleep go to work an lack of appitiete can all do strange thing to ur bodie paracemol could help with ur hot an cold flushes if its not past or sum better in the next day or so see ur doc keep drinkin plenty fluids to hope this helps an u feel better soon xx
it sounds like anxiety and depression. have you seen a doctor
You should see a doctor for bloodwork, EKG and an exam. If needed, try the local hospital outpatient or critical care unit. Good luck!