HELP! pink belly on my new bp

If you have your snakes in tanks this is my personal experience with it.
Using lamps was great for heat and decreasing risk of burns, but it caused a lot of bad sheds (I lived in ME/NH at the time so humidity was already an issue) because it made the tanks significantly more dry than I wanted.
It was recommended to me to switch to belly heat, heat pads were recommended, but the man at the shop that suggested this to me neglected to mention the importance of using a thermostat when using heat pads. Long story short, I have a snake with burn scars on much of her body (even following all the instructions on the heat pad).
Your best bet, **find a thermostat** (I even used dimmer plugs to regulate the heat until I bought my racks - anything to keep the temp regulated), buy a temp gun (very cheap, easy to find), and use under-belly heat for them.

Also, as many people have suggested, you probably want to seek a new vet. Giving antibiotics without being positive that there is a bacterial infection (and what TYPE of bacteria!) puts your snake at risk for a lot of things, including adverse reactions to the antibiotic administration (some snakes develop abscesses) and also resistant strains of bacteria that weren't a problem beforehand. I know starting out I also was worried about whistles and heavy sighs when my snakes were going into shed, but you'll learn quickly that it's not uncommon! And pink belly (unless the substrate has been wet for a long time) is going to become your #1 sign for the beginning of a shed!

Good luck!