Blueberrybook,
I know you have both physical and psychological difficulties and I realize you struggle daily. I am sorry this is the case. I have been hoping getting rid of some of your meds might be helpful soon. I would definitely feel lost if I was taking the medication you had listed. It must be overwhelming to lose time. I do lose chunks of time, mostly due to dissociation. Some people are more prone to losing time if/when they spend a lot of time home alone/isolated.
I do hope the event goes well tonight. I know it is difficult for you,especially when your H cannot accopany you.

If it was me, I'd examine how I am thinking about the gathering, in order to see if there might be some catastrophic thinking, or other unhelpful thinking patterns involved.
I know you are nervous and are beating yourself up a bit. Don't expend energy on anything negative. You can do this! I hope you and your daughter have a great time!
EDIT: Typos
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