being in the process of an EGR change due to the EGR valve head coming off the stem I am now worried about the turbo on that side......

Initial minor fault of a rough idle around 500 miles ago, before restricted performance at 50mph cruise which is when I stopped driving. Have I damaged my Turbo or will I be ok?!

Car not mapped, or driven hard (certainly not in my limited 1000 miles ownership) car now on 75k miles

The side the EGR went is slightly oily, but only in the realms of what I would say is normal, other side is a little drier though. Should I be checking my intercooler bottom hose/oil levels regularly?

actually looking at my pictures, I have that the wrong way round. the side the EGR failed is actually drier than the other side