E Rank Healer/E Rank no Kusushi
Here's a synopsis I found for the manga:
Healer Carol is an E-rank... even among adventurers, it's the absolute weakest. Even though I was told that I’d be useless... I tried my best for my comrades and continued creating medicines but… in the end, I was still thrown out of the party! I don’t have enough money to get back home and the future looks bleak in this strange town. In the meantime, Carol met a dying adventurer, Kaido, by chance. She treated him with the medicine which she had created for free. While doing that, for some reason, the medicine received extremely high praise---!?
The light novel series looks to be three volumes long and I'm pretty hooked on the manga. I'd love to see an official release of this so I can support the author.
The premise is ultimately that you have a MC who is pretty OP when it comes to medicine, but has been abused in her first party, so she assumes that she's useless. A lot of the story, at least from what I've read, is her coming into her own.
I am also waiting for the manga translation of this one
It's an AlphaPolis series unfortunately. There's little hope we'll ever see it. (At least for now...)