Hello mama! Fabella usually starts accepting patients early in the morning (around 6-7am), kaya best go real early para makakuha ng number agad lalo na charity wards ang puno talaga, try mo ring mag-follow up sa phone nila para sa exact schedule since they accept walk-ins pero may limit pa rin. From Cavite, you can take a bus to Manila (Buendia or FTI area) then jeep or tricycle papunta sa Fabella sa Magsaysay Avenue, or if hassle, may ride-sharing din pero pricey, plan mo ng maaga ang byahe para hindi stressed ka bago check-up! Sending you lots of good thoughts for your first prenatal visit, mama, you're doing great taking care of yourself and baby!