Hay nako, same here sis! Ako naman umaabot hanggang 5-6 months bago huminto ang pagsusuka, so you're definitely not alone, iba-iba talaga ang bawat pregnancy. The good news is maraming moms na nakarating ng third trimester feeling better na, but since it's affecting you pa rin at 21 weeks, might be worth mentioning to your OB next visit kasi they might suggest something to help, whether it's dietary changes or meds na safe for baby. In the meantime, try small, frequent meals instead of big ones, ginger tea helped me a bit, and sometimes it's just the smell ng certain foods na nag-trigger, ganyan talaga ang preggy body natin! Hang in there, mama, this phase will pass!