Depo shot

Krystal • 24 years old. Married to the love of my life. Just a down home country girl! Loving life

So this may be a dumb question but I’m curious. I got my second depo shot in March. I’m supposed to get it again in 2 weeks but mot going to since me and my husband decided to start trying to another baby. I’ve never had sore boobs ever on this shot. I was on it once before and never had any pregnancy symptoms. I’ve taken 4 tests and there all negative. Any ideas?