unknown cause-lupus,cancer?

hi everyone! I'm not sure where to begin but over the past 2 yrs I have been medically getting worse. I have 3 small children and get scared sometimes.
It all started with back problems (burning) then my legs (varicose veins removed) I have a severe case of raynauds but now everything in my body is out of wak! I do have this birthmark that has REALLY changed in my buttocks and now there is like 3 more pimple like bumps around it. ever since that has acted up I think I've been getting sicker and sicker everything from added hard bumps on skin to pain and extreme headaches does anybody experience this? there is soooo much more hard to type it all can anyone help? By the way I just met my birth-mom and she had 2 types of cancer her mom,brother and dad died from it so I'm scared cause I feel like I'm dying sometimes