OH goodness!
I really hate to do this!
A gynaecological emergency is any of the following
cervical shock, (you would be horribly unwell if you had this) normally caused by miscarriage or passing blood clots
Ectopic pregnancy, has your gp ruled this out? Normally presents between 6/7 weeks so after 5 months hugely unlikely.
Severe haemorrhage, not constant bleeding for 5 months
Ovarian torsion, presents as an acute episode of unbearable pain
Ruptured ovarian cyst, acute pain and peritonitis (severe pain across the whole abdomen made worse by any movement)
Exacerbation of pelvic inflammatory disease, unlikely with your negative screen for infection.
If you don't have any of these, a+e can not provide good follow up care or investigation for ongoing problems. Sorry, that is just how they work.
So, please. Speak to your Gp today and explain how you are feeling. He has refereed for a scan, but it might be quicker to see a gynae consultant. - they sometimes have one stop clinics where the do your scan and appointment on the day
If your pain becomes too severe to cope or your bleeding gets worse then go to a+e and be prepared to be admitted to gynae.
Otherwise push for a sooner scan and urgent outpatient gynae referral.
Ponstan may help with bleeding and pain too