Trouble sleeping @ night?...

I'm almost 19 wks and the past few weeks I've had trouble sleeping at night. I am constantly switching from my left side to right side all through the night and not getting much sleep. (Before i was pregnant i was a without a doubt stomach sleepy so side sleeping was an adjustment in the first place). Yet for some reason i can sleep at least better and longer during the day time. Is anyone else dealing with this & possibly found a way to sleep better at night?

- I've tried pillows under me which helped at the end of 1st trimester but npt anymore.

-I've been trying with a pillow between my legs.

-Nothing seems to be helping.

Suggestions much needed...