Hey I've Gained A Lot Of Weight And More Tired

Hey I've gained a lot of weight and more tired than usual for about a month now..last month I got my period on the 23rd & this month I got it on the 12th..(a week early)
no cramping clots or nothing .I've also vomited about 6 Times this month &I have had burning sensation in abdomen twice and yesterday it felt like trapped gas in my left ovary and I felt constipated & gassy..what's going on