Healing Mastectomy Scar

I'm now 8 weeks post-surgery and the scar feels a bit better most of the time, but it is drawing in tightly at times.  I find that pain from the scar wakes me up a few times each night.  Then a bit of Moogoo and a bit of a rub and it settles, but it is annoying to have broken sleep.  I'm going to try doing a few more sideways arm/shoulder stretches and see if it helps and I'm seeing the physio on Friday so maybe she'll have some ideas.