Ay, hirap talaga maghanap ng good CAS clinic, especially sa probinsya! I haven't personally tried any around Calamba kaya hindi ko masigurado, pero try mo mag-ask sa local moms' groups or sa Calamba community pages, maraming mums doon siguro nakakahanap na ng trusted clinics. You could also call the Calamba health center or ask your OB kung may referrals sila, kasi they usually know which clinics are reliable.