So my period was three weeks late and when I did start I only had it for like two and a half days. Since then my boobs and belly have itches and hurt. My back hurt more the usual. I also feel like I can’t get enough to eat. And I have heartburn no matter what I eat and I wake up with it. And I want sex more then usual. I’ve taken pregnancy test and then have been negative. Should I be concerned? Should I get blood work done?