Hey mama, congrats sa first pregnancy! Yan ay normal lang, sometimes you feel the baby's heartbeat or hiccups kasi mas malapit na sila sa ribcage mo at mas malakas ang movements nila ngayon sa 33 weeks, kaya ramdam mo talaga lahat ng sensations nila. A few of us moms felt the same thing and our OBs said it's just part of the whole experience, pero para sa peace of mind mo talaga, best to mention it sa next checkup mo para ma-confirm ng doctor na everything's good with bubs!