Okay so let me start by saying my periods were always only 3-4 days long. (I was about 90-95 pounds on average.) Then out of nowhere I started gaining weight, and my periods evened out at 7 days. (Im now at 110) Its been like this for a few months. (Just so everyone is aware, im 5'5" and ive always been small framed. It runs in my family!) Anyways. My periods finally evened out after these past 3 months or so, and Ive been able to have glow predict my periods to a T. Until today.. I had my last period as normal. Then had a week off. Yesterday was suppose to be my first ovulation day, and then today I started my period again. What could be the cause of this? It cant be stress, because normally when im stressed my period is late, or I skip it all together. Im just a bit concerned at this point.

On a side note, my manager freaked me out last week when I was talking about my weight and i was really nauseous a week or two before that, (but a couple of the guys i work with had the flu so i figured it must be that). She was telling me I could be pregnant and still have my period. It was a slim chance but i took two tests anyway not because i thought i was, but because i figured if i am i need to know asap to change my daily routine. Both tests were negative.

So, do you have any idea what is going on?