How much weight have you put on, has it been gradual or suddenly?
Getting a home monitor blood pressure test kit might be a start. Taking BP - best of 3 - at the same time daily, making a note to take to your GP. DH has white coat syndrome which means his BP flies hi in the surgery!
How long as appt.s to C a GP at your Surgery, perhaps ring to find out. A blood test can be taken by the phlebotomist ........... in the mean time, keep a note of your symptoms?