Chronic Back Pain before pregnancy?!!

Hello ladies! I've had very bad lower back pain possibly due to my last pregnancy. I have never mentioned it to anyone or have consulted with a doctor regarding this pain. I feel like it's so bad but I've delt with it over the years. It's not scientifically proven that the epidural might of cause this. My husband has to pop it for me all the time and put pressure on it. I've now been trying for or second baby. I'm scared that this pain could cause miscarrage or have complications because of it. Could I get through it? Should I mention this to my fertility doctor who I'm seeing? Or a regular MD? Help?