Teething?

Angie • Baby#1 due in June
My dd is 14 weeks and she has been drooling tons and always has her fingers in her mouth. Today when I tried to nurse her she screamed and cried like she was in pain. I tried a few more times and finally half an hour later she nursed and passed out. She didn't seem gassy and she normally a happy baby. Could it be teeth? Or is it too early?