@Sienna7657
Sorry if I sound stupid but if I'm the same blood type as her and genetically related- does that mean that there is a chance that I'm not a match for her?
Blood type is not enough. There will be further checks for matching.
I was once a potential bone marrow donor, as my blood type initially matched, but further matching ruled me out.
And you should talk to the transplant team, so that you have full innformation before proceeding.
It's actually more of a risk to the donor than the recipient, and for some transplants, the risks to a donor range up to (and include) death, even if it's a tiny, tiny risk. Being very healthy will not change the fact that those risks are there.
I know a couple of people who have done live donation, and the recovery times given out can be optimistic. A friend donated a kidney to a stranger, who's husband donated a kidney to my friend's husband, in a carefully matched swap arranged by the transplant team. My friend still took around a year to recover, despite being very healthy.
And with you being a single parent, I'd say no way. Your DC need you more. If you feel pressured, then talking tto the transplant team will help, as they will refuse to accept donations from anyone they feel is being pressured or coerced, or who isn't 100% sure about donating. They will publically state you weren't a suitable match, if this is the case.
I'm sorry your sister is ill, and by the sounds of it, she may be too ill for a transplant anyway.