Confused: 17 Days Delayed

Hi guyss! I just wanna share my story. I had my first D/C last december 2018. After my D/C my menstruation cycle become 33 to 38 from 28 to 30days cycle, my husband told me that it's still normal since my period is every 33 to 38days(btw my husband is a nurse). But today I am 17days delayed and I am so worried about my cycle (and to tell you honestly i am already expecting that I am pregnant today). I already had my PT and the result is negative. This really makes me sad. Do I need to visit my OB?