Irregular Periods after pregnancy please help!

Janelle
After an eventful pregnacy with my second child (I was diagnosed with subcronic hematoma and had two big bleeds with bed rest for a total of four months) my son Wyatt was born on March 16, 2016.  
My period has always been irregular most likely due to my weight (topped out at 310 but got it down to 250 when I got pregnant again).  By the time I actually had Wyatt I was 315.  After the second c-section they also did a tubal to prevent future pregnancy.  It took me a long time to heal.  The initial bleeding was intense.  When Wyatt was about 5 months I had a very short period. My body would try after that but only spot to light flow.  Sometimes dark brown sometimes bright red.  Wyatt turns one and I'm getting really panicky about why I haven't had a normal timely period yet.  I would cramp but nothing.  I began to think something's wrong but decided to wait to go back to my OB for the annual Pap smear which he then prescribed me progesterone pills.  I took one a day for seven days starting on 5/6.  Almost two weeks later still having cramps and still bleeding lightly.  Has anyone else had this problem and do you know when this bleeding with stop?  When will I be normal?  I turned 39 the month before Wyatt was born and have thus far got down to 290 and dropping.  I'm trying really hard not to panic.  Any advice or experiences will be so helpful thank you!