Struggling with sleep :-(

Hi girls. Usually I am the sleep queen, but the past few days after finding out (I'm 4wk 5days) I'm really struggling to sleep at night. I've just woken up after only 4hrs. I can't go on like this. I've got a full time job and a horse to look after.. At this rate I'll be exhausted after a couple of weeks!! Anyone got any sleep tips? TIA x