21 weeks - very light spotting?

An

I’ve been having a lot of discharge for a couple weeks, but it’s always been clear, white, or just slightly yellow tinted so I figured it’s normal. But when I took off my underwear this morning, I noticed there was a tiny bit of, what looked like, dried blood. Is this worth contacting my OB about? I haven’t felt much movement by the baby, but I didn’t feel any at all until 20 weeks, and the heartbeat was there when I checked yesterday.