Hi. Thanks for your reference. Noted your history of few days of feeling hot and cold, dizziness, felt like passing out, vomited and feeling like pregnancy although you are on a coil. I would think this as a problem with your hormonal imbalance. Sometimes pseudocyesis can present the same way. I would advise you the following: First of all, to consult a Gynecologist, get urine and blood pregnancy tests and an ultrasonography so that pregnancy be better ruled out. If negative you can get another tests of blood to see for any thyroid problems Get symptomatic treatment for the symptoms that you have and see for the causes that may be found out by keen observation. Do not allow dehydration, drink plenty of fluid and rest of the treatment as per the clinical evaluation and tests reports.