Is my period irregular?

Michelle • 30years old. DH: 29. Married 5 years. 1 DS 1.10.15. Expecting DD 9.25.17
Is this considered irregular? It's off by a couple days most months. 
​I have been stressed. Mid February my grandpa lost his leg and my mom just recently had surgery. My husband and I bought a house in November. We strayed really "trying" in March. We tried in February but w grandpa loosing his leg i wasn't home much. 
​What is going on?!