please help!!!

i’m almost 6 months postpartum and i have had my period on time every month since 9 weeks postpartum, my period was due 3 days ago and i feel as tho there is so sign of it coming🥴 i have also noticed ive have been having a lot of creamy/egg white cm which is a bit unusual as my period should of been here 3 days ago, according to my <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> my fertile day was the 28th september, i had sex with with my partner on the 3rd october, 6th october and the 12th october, using no oreorecion besides the old ‘pull out method’ is it possible to get pregnant in that time and when would be the best time to get a positive result?