My Name Dina.I Used Insulin Lantis 9* Units At Morning

My name Dina.I used Insulin Lantis 9* units at morning and 14 units at night time,plus 3 times insulin
Apidra before eating
6,8,7 units,how get me my FreeStyle InsuLinx blood glucose monitor.
My doctor today got me new insulin Toujeo instead Lantus.
I has had insulin injections 40 years,diabetic tipe 1.Excuse my English,I speak Russian,79 years
old.My question:Do not mix Toujeo with any other type insulin? Thanks in advanse.