I Am A Diabetic That Usually Runs In 300 Range

I am a diabetic that usually runs in 300 range sunday i accidentally gave myself my novolog instead of my lantus n awoke in the middle of the night to blood sugar of 42 since then i have been running abnormally low for me 60 to 150 n am hitting lows consistently i feel very nauseated constantly loss of appetite dizzy n my thoughts are cloudy weak n tired