Doubled Cymbalta and can’t stay awake

So last week I went into see my doctor after having about a month of horrible joint pain (5x worse than usual) and she moved me up from 30 mg of Cymbalta to 60 mg. My joints and muscles hurt way less but I can hardly stay awake, I struggled with fatigue a bit before but now I’m sleeping 12 hours a day with a nap in between and still feel like I can fall asleep at any second. Anyone else experience this?