Hi Chinwag
Could be he is tired. At different stages Pete had mini tremors mainly when he would be reaching with his extended arm. For me when Pete started having mini shivers when he was asleep that was a sign of progression.
Hope you are keeping a diary of things as it really is helpful, also having questons prepared for oncology appointments, I felt like a PA most of the time but it helped me focus and remember everything.
How are you both coping? The build up to MRIs can be so stressful and I wish you all the best with the results and I hope you don't have to wait too long for them.
Minx