No period not pregnant and breastfeeding

I'm currently breastfeeding my 4 month old and my period hasn't started Ik that breastfeeding can affect your period but my period came back instantly once my baby was born and I got it at the same time which is usually the 22nd now my boyfriend has finished in me on Oct 4 and I ovulated on the 6th and I had a little spotting so I thought I was pregnant and I took a test on the 23 and the 24th and they were both negative so im confused where my period is