Hiccups

Elizabeth • BFP on 4/10/17 for baby #2 ❤️ [Baby #1 = Jan 2016]
I have been feeling my baby hiccup daily for about a week (I'm 35w). However, the past few days it's been multiple times a day (3-4) and for 10+ minutes. Should I be concerned??
I called my doctor today and she told me to not stress but I can't help but feel anxious over it. How often do you feel hiccups? For how long?? Any insight would be appreciTed!