Slow amniotic fluid leak? slight TMI

Taylor
I'm 37 weeks and while walking around the grocery I had a large amount of either super watery discharge or my water is leaking. Is there any way to tell the difference? The only reason it concerns me is I haven't had much discharge at all during pregnancy and it was enough to soak through to my shorts 
Update: I'm GBS positive so I would have to start antibiotics after water breaking. Conflicted about making an l&d visit 🤔