Norvasc and medicine

I've been taking this medicine Amlodipine Besylate 5mg (generic for Norvasc) for two months. First my feet and ankles are swollen all the time, this only happened to me 34 years ago two days before the birth of our son. Then the itching on both arms and both legs. Then the blisters on my legs and arms. Then the numbness in my right toes. These blisters remind me of shingles my grandmother had in her 80's. I'm (55). I am allergic to anything with sulfur in it.

I was recently switched from Toprol XL to the generic form of Norvasc. I have been on it for a little over a month now. I am feeling less tired although i do notice more frequent headaches and some constipation. I don't have any swelling yet but I haven't been on this medicine that long. But I am 2 weeks late with my period and am wondering if this new medicine has something to do with it. I have fertility issues so pregnancy is unlikely although not impossible. Has any other women had any other similar experiences.?I was never late or missed a period and now this is freaking me out.