Good day girls. I've hurt my back, or maybe I just strained it. I don…

Good day girls. I've hurt my back, or maybe I just strained it. I don't know what exactly happened. My lower back hurts, and it feels like it's in my left leg. I can't even bend down, and I can barely walk :( . I'm applying Traumeel cream and apply Mentazin at night. I read that Mentazin is not safe during breastfeeding, so now I'm thinking I won't use it anymore. The pain is unbearable. What do you suggest for pain relief and not interrupt breastfeeding? I haven't scheduled an appointment with a doctor...