I am 52 and the last week I've had very bad pains in my bottom of my back and the two sides.when I lie down on the bed to go to sleep the pain makes me feel sick more if I lie on my side and this is both sides if I lie on my back it seems to be better for a bit it keeps me up most of the night and when I get out of bed it feels better can anyone help me with this and tell me what it could be.thank you