Did progesterone pills make af different?? shorter?

Hi, My dr put me on progestrone pills to take while ttc because my level were low(m/c oct 23), I take them starting day 17 till day 28th when af starts.(unless preg, then then take till 13 weeks) My af started on day 28 just like supppose too, but started tuesday and have now pretty much stopped thursday. Now just brown, small amount. I usually get 6 days full bleeding. Would pills be doing this?
I always o'd on day 14, ALWAYS. and now with these pills I think everything is messed up, I know I o'd 6 days early last cycle and missed it.

I took Preg test on day 13 and negative, so I know I am not preg.

Is this normal, anyone have any ideas. Just frustrating, as I used to have normal everything before these pills.(even the first cycle after m/c was normal-before I started progesterone pills)

[lovefamily]

I take prometrium.  Before becoming prego I took them on the 1st day after ovulation (I charted) and went off them the 1st day of AF.  They seemed to make my af a little heavier.  I had very light AF maybe lasting one day.  The prometrium cause me to go heavier for 2 to 3 days.

[WeeWee524]

I had extremely heavyAF with clotting for 14 days straight. Dr prescribed medroxyprogesteron to stop AF so i can have a SHG (sonohystergram) that has been rescheduled twice because of AF. AF finally lightened up on the 18th day. My questions are: Can taking progesterone help with ttc?  andCan i still get pregnant taking progesterone