Chance of preg

Charlie • Avoiding pregnancy tracking my cycle
Not getting my hopes up and chances are prob pretty impossible 
I came off the pill this month on the 4th got my withdrawal bleed on the 8th and spotted for 3 days lightly after a 5 day period 
I had sex the day before my predicted ovulation with a 27% chance and then again on ovulation dat at 33% I have hypothyroidism too and wondering would I have a chance of getting preg  after stopping the pill so recently my period is due the 5th of Feb at 28 cycle but being off the pill who knows if my period will come or even be reg