Blake you seem to be focusing a lot on the phrase "I am seeking help". From your posts, it sounds like the statement gave you a renewed hope and now maybe it is tormenting you that you may have acted too soon.
Well, just because someone says they are seeking help does not mean all the problems are going to be solved and there will a happy ending. We can't assume that.
Only 3 of 10 who leave rehab stay sober. It's estimated only 3 of 10 succeed in any program. The stats are depressing. And, remember she didn't say she has found help, or is starting with anything. "Seeking" can turn into a whole lot of nothing.
It is hopeful that she is acknowledging, but it may not mean she is going to act on it.