weaning BF

Baby has been supplemented since 3 months and slowly but surely got to only night feedings. Now she sleeps through the night and won't nurse before bed or when she wakes up because she wants a bottle. She is clearly wanting to be done but I'm not. Major weaning guilt. I've tried everything and even pumping some and putting in her bottles. But I know it's not about me, but about her. Anyone been through this? Not sure what to do? Let it go and be done or what?!?!?! 😭 Plus I'm pregnant and my supply has dropped and that's when she really started fighting it (some people say your milk tastes different during pregnancy). I just feel like I need to still provide for her, even though I know I am because she loves her bottles. I made it 8 months, but would have loved to make it longer. Not sure what to do...