Insomnia

8w4d, and this insomnia is no joke, yet again. I'm pregnant with my second, and my first is only 9 months old. I'm currently in a complete shit situation at work where I am literally the only person working there until I get my new guy trained, and that is an impossible task, so I am incredibly stressed out and can't sleep at all for worrying, on top of the normal insomnia due to nausea. I have meds but they work shotty at best. Any advice on how to get some sleep so I can function for my child, family life, and work the 50+ hours expected of me right now? I appreciate it.