BPs may wheeze or whistle slightly when stressed. He is stressed because you're handling him. I don't mean that you shouldn't handle him - we all want to hold our snakes, lol! But 3 times in one day is a kind of a lot if you've only had him 2 weeks. Take things slow and gentle. Get that uth set up asap and moniter it with an accurite digital (go to Walmart - $12) and that will help. When husbandry is correct, they don't stress as easily. Pics would be nice too!