cant find cervix?

15 weeks pregnant. was self checking once a week like I normally do and noticed today that I can't find my cervix. at all. it's like it up and disappeared! cervical discharge is normal, baby is growing normal, no pain or any issues. just wondering where the hell my cervix went?! I haven't been able to find much about it online other than the fact that women 30+ weeks notice theirs disappearing... but I'm 15 weeks along. I'm just confused as to where the hell my cervix went! anyone have any insight? doctor visit Monday if it's still an issue by then I'll discuss with her. I'm just confused I literally couldn't find it anywhere it's like it turned in on itself or something? 😕😕😕😕😕😕😕