Hi Doctor!- I've been getting period like pains in my lower abdomen for the past 3 days now eventhough I am not due my period for another 3 weeks. I get light headed, nauseous, and have a burning and bloating sensation in my stomach (it swells up so much sometimes it looks like i'm pregnant!) and along my right side of my back? There is also a gassy smell that comes from breath (not burping) when the burning and bloating is at it's worst. Any ideas as to what it could be? could anxiety be a contributor?..Just to point out this has been on and off for me over the passed 2 years increasingly becomming more frequent. Thank you!!