Breaking Baby Habit

So my baby has this weird habit of sucking on my finger as though it is a paci. It started when she was a newborn because she had a weak suck when trying to breastfeed and this was a way to improve her suck. She used to also take a paci, so it was fine. But then she got thrush and we had to take her pacis away until the thrush cleared, so then she started treating my finger like a paci nonstop and wouldn’t take a regular paci at all. So fast forward to now, she’s 9 months old and still using my finger to suck on when being rocked to sleep, during breastfeeding, and for soothing when upset. She has teeth now too so she’ll bite down and it hurts. How do I break this habit? Has anyone experienced the same thing? It’s hard because I can’t “take my finger away” since its always attached to me and she can see it’s still there 😂