hi there and welcome to TP - you will find lots of support on here.
It is always worrying waiting for an appointment. The bloods could mean many different things. You would be best to give the GP a ring and ask or ask at the clinic appointment because it would just be trying to guess to do anything else.
Take care and keep posting x
Hello Sam, welcome from me.
I am no medic and I agree with Fizzie about speaking to the GP , who may well be able to put your mind at rest. It could be that mum is lacking something in her blood that is easily dealt with.