I ve had an iud placed in October 2015. From December to June, I had short(1-3 days), very light periods. Beginning July and increasingly so in August, my periods are longer (almost if not a week) and heavier. My periods before the iud were heavy and lasted about a week as well. Also, when my period starts, I get really intense sharp cramps as opposed to the dull achy cramps I got before the iud. Should I go in for a visit or is this inconsistency with the iud to be expected?