Answered by Stephanie, Hiring Expert at AT&T Inc., on Tuesday, May 1, 2018
Woo hoo for follow up! Definitely do it, definitely don't over do it. A thank you note should happen the next day if you're going to do one, the follow up should be driven by the schedule your interviewer gives you when you ask them when they are planning to move forward. Ask the questions, lay the groundwork. Those two messages are all you get. If you hear from the recruiter, great! You can follow up again. Don't hear from them, there could be a number of things at play. Hounding the recruiter will not bring you the positive outcome you seek.
Keep a high number of irons in the fire and one of them is going to work out! Best of luck!