I can't even begin to think about the number of times I've written on this subject. One search of exclusives on the blog will probably bring up a ton of posts. And yet, I still get emails like this:
I'm sorry for bothering you, but I wanted to check in with you on the status of my romance novel, SECOND CHANCES. I first submitted the book eight weeks ago and I'd like to know if I should continue to wait or start querying other agents. Thanks again for this opportunity.
Why, oh why are you waiting for me to respond before querying? I never, ever, ever asked for an exclusive and I don't think I've ever asked for an exclusive. There are very few agents who will ask for an exclusive these days and if they do, ignore it and send your queries out anyway.
Your search for an agent is about finding the best partner for your career. Waiting months for a response from one person at a time is never going to help you kick that career off the ground. So query and submit widely, talk to as many agents as possible and choose the one who is the absolute best fit for your work.