confused

I am having nausea, fatigue, moodiness, cant and dont want to eat anything besides crakers, darking nipples, headaches, and back aches but I am having what I think is a period. I normally have a very very heavy flow. I have stage 4 endo. So I would go through like 3 heavy pads in a day and have a ton of clots but this one I am wearing a liner and there has been no clots. I also havnt had much cramping. If I do get cramping its just a discomfort where normally I can't get out of bed. We have not been using protection. I don't want to take a test just yet. What are the chances that I am pregnant? Has anyone who has been pregnant had a period like this?