Ok, first off welcome to the site. Sit down and take a deep breath.

My first thought is how are you measuring temps now? I think the digital thermometer will help tremendously. You want temps measured on the floor of the tank, not a couple inches up. Also how are you controlling your heat pad temps? Do you have a dimmer or a thermostat? Those heat pads can get extremely hot. I would get the digital thermometer in there asap, and go recheck those temps you have. Once you have a more accurate idea of what you have then go from there.

Secondly, you want to offer two identical hides. Those half logs really don't provide the security that a bp needs. They want to cram theirselves into the smallest, darkest place possible. I would also check those temps on the branch under the heat lamp. We have a couple people that have bps with bp burns on their backs because of them. Just place the probe, of the digital thermometer, on it for awhile and see what you get.

Lastly, the regurg. It's possible that the regurg was due to the low temps and the handling afterwards. Unfortunately, it could also be due to internal parasites. My advice would be to get him to a qualified reptile vet and have hin checked over, more specifically a fecal. (you could also have the sex determined as well if you wanted) The fecal is essential for a clean bill of health. I've thankfully not had a regurg, but I wouldn't think you should be able to break it up so easy. To my way of thinking, it should still basically be a fully formed mouse with the outside of it digested a bit, but someone correct me if I'm wrong. Is it possible it was just a bm? Either way I think a vet check would give you peace of mind, and make sure your bp is healthy.