Nikraden

Hello everyone, I've found through my old games my Baldur's Gate games, which I thought I'd lost them, and I've started a new game with BGT. Everything is running pretty well for now, it's fantastic to play BG on BG2 engine, I have a little doubt though, I have a wizard character that has 18 CON, and when I first created him he had 6HP, but after finishing Gorion's battle and starting Chapter 2, I've found my character with the same level but now he has 18HP, is this normal? Thank you in advance!

Did you cast find familiar?
Edit: BTW, a wizard with 18 CON is no better than a wizard with 16 CON.

Yes I did! That must be why my char's hp has raised to 18. I totally forgot about the familiar bonus and I've just read the spell description after reading your post, it's solved then, thank you both for your fast answers!