Resisting sleep and I can’t stop

Hello! I got diagnosed with bipolar II two years ago, I struggled with insomnia basically my entire life but it got worse after my first manic episode. Recently, it’s gotten even worse to the point where I have to take at least seven sleeping pills to get to sleep, but even whenever I’m exhausted I resist sleep. I can’t go to sleep until it’s literally impossible to keep my eyes open. I was just wondering if anyone else has experienced this?? Or know what to do to make it stop?? It makes me super frustrated but even so I can’t stop resisting. (Also I am medicated and have been prescribed a million different sleeping pills but none of them really work/stop working after a few weeks.)