20 weeks. light spotting?

I just went to the bathroom and noticed when I wiped that it was pink like I was spotting. We didn't have sex last night, which happens when we do, but we spent all day at Disney yesterday walking around from like 9am-6pm. Could that have irritated anything? Just looking for some insight. This is my second pregnancy and I had nothing like this with my first. Anything will help 😁 thanks in advance ❤️