Late period or something else??

Lindsay • Michigan. Engaged. 27. Mother to a beautiful 6 year old girl. 💖👑 Baby number 2 due January 2019! ❤️

So my period is 4 days late. My partner has had a vasectomy. I’ve been cramping since yesterday but nothing yet. I don’t usually cramp before a period, only during. Idk what to think..