Managing sugar level when Humalog/injection is unavailable

Patient: I have accidently Thrown out my nottle of Humalog injection medicine, for which I take 4 shots 10UN 4x ay. My pharmacy is not open today (Sunday). What can I do to help keep my blood sugar as stable as possible for the next 20 hrs.? I also take 10 Lantus 26UN 1xpd in the evening and metformin HCL 500 mg 2x d.