question: Well I'm 18 and for the past week or two just after my menstrual ended I've been experiencing nausea, vomiting, stomachache, headache, frequent thirst and urination, dry mouth, fatigue but last night i could not fall asleep at first i thought it was because of the time change but it was already 11:00p.m. then 12:00a.m. and i finally forced myself to sleep at about 1:00a.m.So please anything would help i would like to know if it could become serious.