Hi mama! A pessary is basically a device na tumutulong to support your uterus or cervix during pregnancy, lalo na if there's risk ng preterm labor or cervical incompetence, it's like a little helper na nag-hold ng baby in place. The insertion process mismo ay hindi talaga painful, medyo awkward lang at may slight pressure, kaya parang sa pap smear, pero ang stay niya inside throughout pregnancy ay usually okay, konti lang ang discomfort sa daily life, like slight spotting or heaviness sometimes. Since bawat pregnancy ay different and may considerations pa like positioning or how your cervix reacts, definitely ask your OB about this ha, they can explain better kung recommended sa iyo and what to expect with your specific situation!