Delayed Menstruation after Covid19 Vaxx

Hello momshies and to-bes. Posting here to ask inorder to lessen the worry, baka meron same experience. Kapapanganak ko pa lang nung June 26,2021. As advised ng OB ko for family planning purposes, nagtake ako ng birth control pills starting July 26 whether or not mag 1st menstruation na after manganak. I was breastfeeding my little one for 2 months pero hindi exclusive dahil formula fed din sya especially kapag kulang ang supply ng breastmilk. Then nung August 2 dinatnan na ako. Nag 1st dose ako Covid19 vaccine nung August 19, tapos Sept 9 ang 2nd dose. September and October di na ako nagkamenstruation until today. Before mabuntis regular ang cycle ko. I took pregnancy test 3 times na pero negative naman. Baka pwede nyo rin ishare experience nyo po. Thank you and stay safe.