Medication

Hey girls. For the last 2 years or so I have been prescribed by my doctor Lexapro 10mg which has been no problem. The last few weeks have been really hard for me so I went back to the doctors and she prescribed me same medication but 20mg. I’m only onto my second day but after I take it I feel really nauseas and same thing happened yesterday when I took 20mg.

Is that normal to feel nauseas?