HELP!!

So I never really get acne except for like one or two pimples around my nose. Well a little over a week ago my husband and I decided to do this 30 day vegan diet, so we have cut out all meat and dairy. Now I'm almost a week late on my period even though I'm on the pill and I've also had this really strange break out on my face that's like tiny flesh colored bumps. What's the deal with the break out?? Could it be the diet? I have no idea what's going on!