Insomnia tips?

Vicki
Hey ladies, just wondering if anyone has been suffering insomnia during their pregnancy? I'm struggling to get to sleep at night even though I'm exhausted, then last night I woke up at 3am and that was me for the day. I'm preparing myself mentally for this to be a regular thing so wondering if anyone has any tips? 
This is my 2nd pregnancy and I didn't suffer like this until the 3rd trimester. I don't know how I'll cope - I love sleep!!