Ok -- so to summarise...........
10 units lantus last evening
10 units lantus this morning
no Humalog with breakfast this morning
safest option is to ring your Diabetic nurse for advice.
if it were me in that scenario I would be taking 1/2 lantus dose this evening ( so 5 units -- or 4 units if a 2u dosing pen )
and normal novalog doses with meals
and lots of testing