Pants

So I'm like 13 weeks. I wear my pants with a pretty snug fit in the waist normally so my pants feel a wee bit tight since I've gained just a little weight. It's not enough to need a size up and definitely not enough to need maternity pants, but enough to make me uncomfortable. I've seen people use hair ties to loosen pants a bit, but that won't work on my nice dress pants that have those metal clips on the inside. Any suggestions?