I read somewhere normal weight gain for pregnancy is 10kg.... But me personally, I think considering everyone is different & every pregnancy is different, I think the normal weight gain is what ever is normal for YOU!

As for the dryness, it proberbly is thrush, but it doesn't hurt to ask your doc about it. if it is an infection, it's better to get it cleared up sooner than later.

Congrats on your pregnancy & good luck!