Is it normal to have really sore boobs if you skip your period (when on the pill)?

I skipped the 'sugar pills' this month because I was going on holidays, so I was meant to have my period last week, but my boobs are extremely sore especially today. I thought that it may just be the hormones building up as it would leading up to a normal period but I just wanted to make sure I was right haha.
So my question is; is it normal for your boobs to hurt heaps if you skip your period? 
(Sorry if it is in the wrong group, I wasn't sure where to go) 

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