Advice? Pregnant? Worried!

Tabbie • Found out April 21, 2015 I was pregnant ❤️ Now pregnant with my second child. Due August 2017 💜

late; even after i gave birth in dec 2015)

My question is, what else could cause my late period. I have had negative test, and not really any signs of pregnancy(besides cramps like my periods going to start but not as strong and a little bit of nausea, nothing compared to last pregnancy)

My last pregnancy i didn't test till almost 6 weeks cause i didn't know there was a chance i could've be pregnant.