Confused and now panicking

Jennifer • 24 yr old soon to be mom & momma to 2 flying babies ages 5 (April '10) & 2mo (June '15). Cervical cancer survivor.
So I've had 2 miscarriages Aug '10 and Nov '14 then a LEEP Feb 22, 15. My Dr was very clear that she wanted to see me every 2 weeks just to be 100% on top of measuring my cervix from day 1 to delivery. Well yesterday I went in they measured me and yadda yadda nothing special but this new dr said "Ok see you in 4 weeks" and dashed out the door. The girl at the desk argued that "oh it's normal" you're 13 weeks and I was like uh if I'm wrong if you're going to have cervical incompetence it's going to show between 14-18 weeks and that's when it's really important to put the cerclage in ASAP while you still have enough to put it in with. And idk I guess I'm paranoid and need to vent and has this happened to anyone else where suddenly Drs have changed care? I won't be going back until almost 18 weeks....