Hello have you had a physical lately? sometimes the flu or other things medically can cause you to feel bad as well. Possibly you were overdoing things a bit and are tired. I really feel that you should have a physical as well, to make sure that your thyroid is okay, sometimes thyroid problems can lead to the symptoms that you describe as well. Especially since the feeling came on so suddenly. I am going ot leave a hotline number for you to call as well if you need to call and talk to someone in person. 1-800-273-TALK. I hope the best for you try to calm down and do the best that you can. Take care sincerely Soidhonia