My boa regurgitated his last meal, should I be concerned?

[PaleStag90]

Hey guys, please give me some advice. I've never had this happen before and I'm worried.

So backstory.

Drogo is an approximately 2 month old Sharp Sunglow boa that i purchased from LLLreptile who arrived Friday 12/18/15.

I noticed upon his arrival that he seemed a bit bloated, but after a day he had a good normal looking poop and was happy to eat on feeding day the following monday. He ate a small hopper mouse with no problems.

Now his initial housing was not ideal. I had him under an infrared heat lamp that warmed his hot spot to about 90 degrees, which i checked and rechecked constantly with a thermometer as I'm a little neurotically sensitive to the happiness and comfort of my snakes and their temperatures.

So he ate that monday, 12/21/15, a small hopper mouse.

Once my flex watt arrived, I attached it to my racks, testing my temperatures reading a nice consistent 92 degree warm side.

So he moved into there Tuesday night, 12/22/15, and noticed he still had quite a bulge from the feeding monday which i thought seemed a little odd. It still looked like he'd just eaten it.

Once inside the rack tub, he was happy to cozy up on the heat, everything seemed fine.

Then this evening, Thursday 12/24/15, I went down and discovered he'd regurgitated what was left. I forgot to get a picture (it stank so bad I just wanted to get it cleaned up and out of there), but it was mostly hair and what looked like to be maybe a bit of a tail left, and about 2 3rds of it was black, while the other bit was obviously white fur. (He ate an all white hopper).

Visually, he appears in good health now, no bloating, or anything out of the usual.
But I've never had a snake regurgitate a meal, and it worries me. Should I be worried?

I'm thinking its probably from the temporary set up he was in prior not getting adequate heating that caused the meal to not digest properly. Even once on the proper belly heat it was just a little too far bad and so he just threw up the stuff that was going rancid? Something I should be happy about, right? Does that seem like sound logic?

I'm just really nervous guys, I love my little guys and this is seriously unfamiliar territory for me.

By the way the mouse was purchased frozen from Petco... I've never liked purchasing frozen items from them, but my own rats haven't produced anything yet. Could it have been a bad mouse? Nothing seemed disturbing about the feeder when I fed it.