i had horrible insomnia when i was in my 1st trimester! barely slept and begged my doc to give me something but she wouldn't. my issue was that i had restless leg syndrome and felt like i had to constantly move my limbs it was horrible. but then when i was in my 2nd trimester, it went away and i've never slept so well in my life! i'm a horrible sleeper to begin with but when i was in my 2nd trimester, i had the best sleep of my life. i could literally fall asleep within seconds when it normally takes me sometimes over 1hr to fall asleep.
they say things look up in your 2nd trimester - you get a burst of energy and you sleep better .... so i hope that is the same for you!