1month and 2 weeks pregnant,still no heart beat with minimal bleeding

Correct me if im wrong so consider ka na 6-7weeks kung 1mnth and 2 weeks yung iba lucky kasi as early as 7weeks meron na pero ideal tlga na magkaron ng heartbeat is around 8-9weeks. So snbi ba nila sayo na balik ka after 2weeks? If not or hndi ka satisfied sa knila change ka ob/ospital pag around 8-9 weeks kna