I have tried but very difficult to get appointment
Even if it takes several weeks to get an appointment, you will need a medical opinion. So, keep trying. Your problem will still need attention.
Some GP surgeries in the UK make it extremely cumbersome to get an appointment. In my case, I telephoned the GP surgery a week ago to ask for an appointment. The receptionist said that they will not make any face-to-face appointment without me speaking to a GP first on the telephone. She then made me an appointment to speak with a GP i
n three weeks' time. Yet, in another GP surgery they have a system where they have a small number of face-to-face appointments available for each weekday, if people manage to get through on the telephone.
Please don't give up. Good luck.