pulsating head with muzzy head! what is it?

I have had a persistent headache since the 6th November - a mixture of tension and migraine....and was commenced on propanalol...still awaiting MRI! and still off work.....the pain has really improved but I am left with a pulsating head, some dizziness and a muzzy head feeling....anyone else ever have this? Is this an after effect of having such a bad migraine/headache or side effect of propanalol?

Best wishes for the New Year!!

xx