Is it possible to hear baby hiccupping via a doppler at 13 and half weeks?

Last night after me and my partner had sex, he was afraid he'd hurt the baby during it, and so we listening to baby to make sure it was okay. And on the doppler we found the heartbeat really easy, and then we head a frequent double ''whoosh'' sound. I thought it was moving around because we woken it up, but he said it sounded like hiccups. Is it possible it had hiccups?