Weird symptoms on Birth Control

I started taking the mini pill about a month ago, before then I had missed a couple periods as they're often irregular. Then, nearly two weeks ago I started bleeding and it hasn't stopped. My periods are usually five days. I'm also experiencing strong nausea, back ache, I'm craving everything I see then feel sick afterwards and my face is breaking out when I usually have clear skin. This week I've also been so tired that I've hardly left me bed. My tummy also feels very odd. What's going on? Please tell me this is just the birth control messing with my hormones while they balance out and that I'm not pregnant or developing a condition.??? #needsomegirlyhelp ❤