Hi, I've just started to take 10mg of citalopram during the luteal phase to treat PMDD. I have quite bad reactions to anything with hormones in (erythema nodosum from the combined pill, extreme mood swings from a pill with lower oestrogen) so anti depressants it is. So far so good in terms of mood but it's stopped my period. I have a short cycle and and currently 5 days late. Does anyone have any experience or knowledge on this please?