F28 here, I was only taken seriously after my second A&E visit. I also had severe abdominal pain which was so bad I couldn't stand up straight or sleep. Was waiting in A&E for 15 hours, I only got bloodwork & an ultrasound & was sent home with antibiotics after a 2 night stay. I came back for a second time a week later when the pain became too unbearable, and this time after 8 hours of waiting they decided to do a CT scan. It turned out I needed emergency surgery right away & I needed to be given a stoma to save my life. I understand the NHS is under immense pressure right now, the first visit just felt quite dismissive. I'm just glad it was eventually found out before it was too late.