No period. Negative test. Done breastfeeding

Hello everyone-

I just stopped breastfeeding my son one month ago, but I have been getting a period for several months since delivery. I am now on day 3 of missed period, and I did get a negative test this evening when I took a test.

My question- will a women’s period be delayed when they stop nursing? I am not feeling any signs of my period coming, but extremely exhausted today!! I am hopeful to be pregnant, but trying to not get my hopes up. Fingers crossed!!

Thanks (: