I think i have Crohns or Colitis and the doctors in the UK don’t take me seriously

Hi doctors,

Im 20F who is around 5’3 weighing 60kg from the UK.

Over the past 6 months Ive been getting ulcers on the tip of tongue that come and then heal after roughly 2-3 weeks then go and then a week later they’d come again. At first i thought it maybe recurrent aphthous ulcers and an iron deficiency, so I switched to an SLS free toothpaste started taking iron supplements i even changed my diet to eat more healthier food and honestly it’s has not helped whatsoever but in last two months Ive seen blood and mucus in my bowel movements, and I was getting fevers at night. Googling all my symptoms it said to call the doctors as it was an emergency,so that is what i did one of the doctors said it was my fault I hadn’t gone to the dentist in years, I only go when there is something seriously wrong with my teeth anyway then i filled out an online form and they told me to book an appointment for a blood test, got the blood test but everything came back normal, I discussed my worries to the GP over the phone even though I wanted an in person appointment and she said we’ll do another blood test but look for fecal calprotein in two weeks times,mind you this process has taken over two months. I don’t know what to do anymore expect go to that blood test, I thought my ulcers got better because recently they had stayed small and would heal within a few days, but Ive got one right now and its just getting bigger, honestly it also hurts when I eat and talk.

Would love advice on how to manage these ulcers so they stop coming 🙏🙏