My back hurts all the time. I gag a lot like I want to vomit but nothing comes out. And I get headaches in the right side. I get side pain on my ride side. And cramps but not that sore. I dont' like the smell of cheese. I feel like i have insomnia. I get nausea a lot. And i dont have any appetite. Am i pregnant? Or just Plan B side effects and PMS?