Uterine scarring after d&c

I’m at a loss. My OB doesn’t think I have scarring. So I’ll give a run down of how this has happened so far:

I had a d&c on 9/27. I got my first period 5 weeks later and everything was completely normal cycle and length and flow wise. My second period was totally normal as well. My third one lasted 4 days(day one of just spotting when wiping, 2&3 days of regular bleeding, day 4 brown spotting) from my regular 6 days. Now here I am on my 4th period and I had a day of only spotting when wiping all day long and two days of moderate to heavy bleeding and nothing. My cycles are getting shorter and bleeding is getting weird. My doctor hasn’t checked for scarring and doesn’t think it’s really possible I have it since I’ve been getting my periods every 32/33 days and ovulating on time and I have no pain with my periods. I am so frustrated. I’m supposed to meet with her again on March 4th but I want to call tomorrow and get in sooner. I am really concerned. But she’s convinced everything is normal from a freaking pelvic exam.

I need answers!!!! So tired of the run around