Wah 4 bulan sama, memang penat kan, most of us experience morning sickness awal hamil, tapi kalau still muntah 3 kali sehari at this point, better check with your doctor lah, just to make sure everything okay dan you're getting enough nutrients for baby. A few of my mum friends muntah macam tu the whole pregnancy, tapi ada jugak yang it was a sign of something like hyperemesis gravidarum, so better safe than sorry, doctor can advise properly what to do next. Hang in there mama, semoga cepat better!