Safe Sleep Solutions During Pregnancy: Addressing Insomnia & Nitravet Use

Question
DEAR DOCTOR I'M RIGHT NOW 10 WEEKS PREGNANT.I HAVE A 6YR OLD SON. I'M 34YRS OLD & MY WEIGHT IS 100KGS & MY HEIGHT IS 5.4"INCH. I'M HAVING A TEMENDOUS SLEEP PROBLEM DURING THE NIGHT. EARLIAR AS ADVISED BY YOU I WAS TAKING THIS BENADRYL TAB 50MG BUT ITS OF NO USE, SINCE I USED TO TAKE NITRAVET 10MG, I CANNOT SLEEP WITHOUT IT. SO I'VE BEEN TAKING AGAIN FROM PAST 5-7 DAYS. IS IT SAFE IF I CONTINUE TAKING NITRAVET? IF NOT WHY? I DON'T EVEN SLEEP IN THE DAY.

Answer
I am not familiar with any medication called "Nitravet", nor can I find it  in any of my reference material.  Do you know  the generic name of the drug? If you let me know, I can let you know if it is safe or contraindicated during pregnancy. As you know, in my practice, I would not  use any sleep medication other than Benadryl.