Cervical mucous? Tmi

So....I just had some CM that was thick and stringy and clear. I mean thick like... when you get a gift card and it has that sticky stuff on the back thick. It reminded me almost of what my mucous plug looked like when I was pregnant 😵

Just curious if anyone has had this before? I’m breastfeeding and my son is 9 months and I’ve had one period but it hasn’t come back yet. I took a test yesterday and it was negative but I’ve been cramping for about a week.... idk what to think! Pregnant? Ovulating? Idk!