sorry if this is TMI. but this morning I went to the restroom and when I was about to wipe I noticed a long string of cm (maybe) hanging down from me.

never had this before.

My husband and I had sex last night and I'm not sure if I'm pregnant yet (I'm very late on period but getting negative results) so I'm not sure if it's cm or maybe extra seamen coming out from yesterday. anybody else have this before ?