Blood clot and not sure where it's coming from - 26 weeks

Danielle • Mama to an 8 year old and one on the way!
So I'm 26 weeks and about 2 hours ago I felt like I had to have a BM. I went to the bathroom had diahrreah and then when I wiped I saw this. It was definitely coming from my vagina. I came to labor and delivery at the advice of their nurse. The dr did a check but she can't tell if the blood is coming from inside or outside my cervix. I haven't had sex or anything so this is random. Since they can't tell yet where it's coming from, they are still doing all tests and blood work as if I need to deliver via c-section. Has this happened to anyone else? I'm kinda in limbo, any one have any familiar situations??