is this normal?

A little long but I've tried to shorten it up... A little backstory: I didn't take my birth control pills for the month of May because they made me terribly nauseas. The Sunday after my period I started the birth control patch (which I love). I had unprotected sex the first week (I had the patch on but they say you should use back up during the first week). I have been having very very very light cramping even with the patch on. Period is due next week. Is the cramping normal while I still have the patch on? I've never experienced cramping outside of my period while on birth control. My nipples and breasts have been very sore, breasts also feel heavy and gave seemed to "fill out" more; it's also been hard for me to keep my eyes open during meetings at work - even with a good nights rest.