Your symptoms are suggestive of premenstrual symptoms due to the response of the body to the hormone fluctuations.Although premenstrual symptoms mainly include abdominal cramps,breast tenderness ,headache and fatigue,but it should be remembered that over 200 premenstrual symptoms have been identified,some of them which you are facing.
I sincerely advise you to consult a gynecologist and discuss your symptoms with her.If premenstrual symptoms are ruled out,then other possibilities can be anxiety and panic atteacks,hypoglycemic attacks and hyperhydrosis(excessive sweating).Hypothyroidism can also present with such symptoms,the only difference being that constipation instead of diarrhea is there.
I hope that helps. Please do keep me posted if you have any additional queries. Kind regards.
Thanks- however I really don't think it has to do with premenstrual symptoms but who knows! I just wish I could figure it out before another episode happens. The strangest part is that it only happens around 11:00-12:00 p.m. never in the day time. Very strange