4 weeks and 6 days preggy

nagpa trans v po ako kanina, gestational sac palang yung nakita saken normal lang ba yon for 4weeks and 6 days preggy? pinababalik ako ni ob after 3 weeks para makita at marinig daw heartbeat ni baby. Normal ba na gestational sac palang sa 4weeks and 6 dayd?#pleasehelp