Could I have ovarian cancer?

I'm getting pain in my lower left side of abdomen. Also getting lower back pain. This pain feels like I'm about to have my period but I know I'm not because I've had a hysterectomy 7 years ago. am ridiculously tired and just don't feel myself. I've been to doctors and they have done a full blood test on me. Dr said it could be ovarian cancer so we'll do bloods first and go from there. I've now had a call to say they want to talk to me further about my blood results. They said it's nothing serious. 

I've looked on the NHS app and can see my ca-125 levels are fine but my serum ferritin levels are high and says to forward to accountable clinician....... could someone help me what this all means please?