What Causes A Delayed Period And Discharge From Breast?

I have been getting cold symptoms prior to my period for a while. I have a semi-flexible cycle ranging from 28-30 days, but I amd now 11 days late from the highest end. I have had cold symptoms for the past three weeks and have noticed other issues with my breats too. My right breast is leaking clear liquid and my left one recently had a hard white plug come out of what appeared to be a pimple at first. I am a year and a half over due for my annual and have had numerous abnormal paps in the past. I also have a slightly overactive thyroid where the levels are just under what my doctor considers abnormal. I am very concerned. Does any of this seem to be connected?