I have been experiencing irregular periods starting in July '14 and am worried about why. I have looked into causes but not sure that the basic ones affect me.
I used to have an IUD, but the excessive bleeding caused it to shift and I had to have it removed in September '14. I started a new birth control pack in November. Took a pregnancy test in December (negative).
I am overweight (225lbs@5'5"), have a sedentary job, but fairly active outside. I take a pilates class 1-2 times a week, walk the dogs every morning etc. I stay away from processed foods, but do eat chocolate semiregularly. And I started college last week but I would not consider myself overly stressed. Oh, and The nurse who put in my IUD said my uterus is perfect.

July - wk 1&4
Aug - wk 2&3/4 (overlaps both weeks)
Sept - wk1/2*IUD removed
October - nothing
November -nothing
December- wk /Jan- wk 1
& now.