Question (tmi alert)

OK I need some help/advice I have been TTC for 4 years now. I have been watching cm and tracking cycles and had sex on what I felt was my most fertile days. I am currently on CD 26 I have been having weird pelvic pain since around CD 22 off and on. My cm is what the internet calls school glue consistency I had sex on Sunday night when I woke up Mon morning and went to the bathroom there was a very small amount of blood that was dark red almost brown but haven't had anything since. Does anyone know what all this means? TIA