just had a baby in December worried I am pregnant again help!!!

Luba
I had my baby in beginning of December I had bleeding pp for a few weeks then it stopped. I had a normal period on Jan 29-feb 3. My <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period tracker</a> is saying that I am 4 days late and I don't feel and sighs of a period is this normal? Oh and not on any bc.