I seen so many Mommas posting about October Babies how do ya'll know? I mean when was your last period? And when did you tested? im trying to conceive my 3rd baby and i've been very active specially during fertile week and ovulation day

I had the IUD for 10mths it was Kyleena IUD which is a very low hormone IUD i removed it on December 27th

Before removing it i had a period on December 8th so 2 days after removal i had a period again lasted 4 days (Dec29-Jan1) so then i got my regular period on January 9-12 so i was tracking both periods just to make sure of Dec29 was a period when do i ovulate and same for January Period, so i've been active for both fertile week and ovulation days

So right now if my Period was Dec 29th I am a day late already so when should i test?? Should I wait till 1st week of February?? What would be the best day to test? Or should i wait till the 9th to see if i get my period or not?