Leaking amniotic fluid or urine?

Whitney 🎀
This morning I noticed a wet spot on my sheets that dried hard. It doesn't smell like urine. I am 21w3d and of course I start thinking the worst :( I do pee a lot during the day and night. Normally during the day I have discharge and nothing else on my panties. Am I overreacting? Husband thinks I am. First baby so everything scares me.