“Urgent” biopsy cancelled and then put back

I orignally contacted the doctor about excessive bleeding post menopause on 24 September. I was referred for a scan, which was cancelled due to staff sickness and rebooked a week later. Following the results of the scans, on 18 October I  was referred for an urgent two week appointment with suspected ovarian cancer. Eventually they contacted me and gave me a date for an appointment of 4 November. Then they cancelled that and said the consultant needed me to bypass the consultation and go immediately to biopsy on 8 November.
Two hours before the appointment it was cancelled.

I have now been contacted me to say my appointment is 13 December.

This will be 12 weeks since i rang the doctor with symptoms to even get the biopsy. And that’s 8 weeks after being told I would be seen urgently within 2 weeks. 

i am worried sick, my work and wider health is suffering- my glands are up and I have an intense sore throat and headache.

And my symptoms have gotten worse- my stomach hurts constantly and I have odd deeper pains around my middle.

My legs ache, I have very frequent burning urination and I am so fatigued I can barely move some days.

I also have extremely low iron- down to 11.

And my grandma died from this illness.

What can I do? Is there anything I can do? 

Im so  worried about the acceleration of any potential illness during this time. 

I feel so helpless. Any advice would be great.