Have you got regular tests? Not digital?
No only digital- I’ll go out to the shop now though!
I've only ever done normal clear blue or first response. Bit more expensive but much clearer at early detection.
You could probably ask the doctor for a blood test that would confirm if HCG was actually present. I'd try a traditional test first too just in case the digital one went wrong (easier to tell if it's messed up when you can see the lines).
Sometimes when your HCG is too high it shows negative. That's what my friend said who is a GP. I would still contact your doctor to confirm
I would definitely take another test, first morning urine if possible