Need help

Hey ladies , I need abit of advice , I've phoned my doctors and they have told me I need to phone back tomorrow because they can't give me an appointment today , so I had my period on 12th November and it only lasted 5 days which is abit usual for me normally I bleed for 7 days , then I started spotting on the 19th then stopped then on the 22nd I started spotting again and then it stopped then the 26th ovulation day I started spotting again and then it stopped and then on the 30th I started spotting again and now day on the 1st December I've started bleeding but its still not as heavy as what a normal period would be but I've got awful back pain and awful stomach pains like my period, mainly can feel the pain in my left side , any ideas what this could be ? I cant get out of bed because the pain is so sore but can't get to speak to my doctor either 😕 but im not due my period until the 11th of December