Hi! Congrats on your new little one. I also got my baby far too young. We got Reesie when he was 7 wks. We had a rough go at first, but things got better, just hang in there. Patience is the key.
Reesie's hair was a mess when we first got him also, but it soon grew out and now he looks like his normal self. Sometimes I think their baby hair can look funky until it grows out. I think it's cute though.
Keep a close eye on your baby. As soon as she starts to act sluggish or tired you need to give her some nutrical or karo. Also, if your breeder has her on hard food already you should add just a bit a water to make it softer for her to chew. You don't want her to waste all her energy just on trying to crunch her food.
When we got Reesie he also had worms. The worms are causing her tummy to be bloated. You said the vet gave you some meds for her to take for the worms. Make sure you keep an eye on her tummy to make sure it goes back down in a few days. If not she may need more worm meds. Just talk to the vet he will know what to do.
Hope this helps. Congrats again on your new baby!
Post some pics of her so we can see how cute she is!