Worsening depression because of IUD?

Hello all. I got my iud our in about three months ago and since then I have had three episodes in the past MONTH. Like crying, wishing I was dead episodes. Normally I’ll get one every few months but not like this. I can’t figure out if it’s the iud making it worse or I’ve recently picking up smoking (pot) and though that could also have something to do with it as I am on zoloft.