Allergies and insomnia first trimester

Hey y’all so I’m entering week 6. My first appointment isn’t until February 14th. Does anyone have any experience or insight on what is safe to take? I’m getting very little sleep with severe insomnia and my allergies are definitely also contributing to staying up all night. I used to take melatonin as a sleep aid but have been told it isn’t approved. I’ve stopped taking it and now heaving a very difficult time going and staying asleep. I also used to take a generic Zyrtec but have also stopped since we found out I’m pregnant. Any tips?