Long time "lurker" and first time poster. I am wondering if anyone has an opinion on my situation...I received an unofficial email from a PI I met with earlier in the fall asking me if I was still interested in joining his lab and gave me the dates of the recruitment weekend at the end of February. He said I should be hearing from someone from the program soon with an official invite, but no official invite has shown up after almost a month after talking with him. Should I continue to wait for an official email or email someone in the department to ask about an official invite?