Anxiety at night

I swear from like 9pm to 6am I don't sleep and I have bad aniexty at night.i feels like I can't breath.and I'm yelling at everyone.i start freaking out....I have no idea where it's coming from.maybe I'm getting closer to my due date.idk....but I want to sleep at night and feel no worries.....I feel bad for my kids.because I'm falling apart.and they can't help me....and I don't want to talk to my husband about it either.because he working two jobs and I don't want to put more stress on him...ugh......