Did I lose my mucus plug?

Sa

I am 23 weeks pregnant today. I just went to the bathroom to pee and while I was wiping I felt like there was something solid sitting there. So I dug with my finger and right at the vaginal opening there was a solid light brown half inch piece of something. I have no idea what it was. It wasn't mucousy, and I haven't had any vaginal discharge this pregnancy. What could it have been? I am thinking a mucous plus has to be sticky and look like mucous right? This was light brown in color and solid, but soft, squeezable. I don't have a picture because I got too scared and flushed it. Should I call a doctor? I am staying extra alert to make sure I am not cramping or anything. But it's 1:30 at night and I am scared to go to sleep thinking I will miss some symptom :(