Recently I received contact info for a professor close to me, with similar interests (Professor B), from another professor I have a long-standing working relationship with (Professor A).
I spoke with her at the beginning of the month, and had what I thought to be a great call. She expressed interest in having me work with her on an upcoming grant remotely, in preparation for applying to her graduate program in the upcoming application cycle. We ended the call with the decision to have me touch base with her in a week, when she would know more about her grant.
The next week, I sent her an email to follow-up, and set up a call to talk more about the project and set up time to visit her lab (something we discussed on the call. No response for one week.
I sent another email, and received a one sentence response: "Things are hectic now, please touch base in a few days". I waited 4 days and sent another short message. It has now been a few days and I still haven't gotten a response.
What are my best next steps? Should I write this lead off, and not bother sending anymore emails if I don't hear back?
EDIT: That is to say, how long should I wait for a response before reaching out again? I don't want to be bothersome, but I also don't want too much time to elapse and this project to possibly be scrapped or forgotten.
I also have the option of going to Professor A and starting some work on the project while Professor B is otherwise occupied. But at the same time, I don't want to seem like I'm "going around" or otherwise excluding Professor B.