So I'm a couple weeks late on my period and i also have been having some pains in my left side/lower back. I have to pee constantly but it doesn't hurt. I don't have an appetite and all the foods that use to make me hungry by the smell of it, makes me sick. I've been nauseous almost every morning but haven't actually vomited. I don't understand what's going on. I'm going to the OBGYN in 2 weeks, but I really want to know what's going on! Any advice/opinions?