Please for the love of god someone please tell me they have some type of remedy to help with insomnia?!

I am 21 weeks pregnant, I switched my anti depressents 2 weeks ago (started with every second day and gradually moved up after doctor approval) ' I have maybe had maximum 3 hours of sleep each night & it is driving me crazy 😭😭😭

Is there ANYTHING to help?! My doctor said the anti depressents shouldn't be making me that tired with insomnia but at my next appointment if it's still the same we will look ar underlying issues. That's 4 weeks away 🤦‍♀️ so please help !!! 🤞🤞🤞