Teething Help...Tiny mouth!

Our baby came early and is growing on track at 3 months old, but she seems to be teething and none of the regular teethers fit in her tiny mouth! She goes to town on her hands or pulls her clothes up to her mouth and sucks...a binky/pack doesn’t help I think because it’s too smooth—she spits hers out (though still uses it for regular soothing ie at nap time). What can I do?