Have just had a phone appointment with the haematologist - my bloods were perfectly normal except for a slightly raised white cell count (which, I didn't say, is what worried my GP in the first place!); I am to have another lot of blood tests soon and if they are normal, too, which they expect to be, I will be discharged!
Thank you all so much for your support over the last few weeks; it has not been a happy time with this at the back of my mind all the time.