have u set up an appt w a gynae yet? just go for an ultrasound scan to have a peace of mind so you wouldn't be worrying too much. I had my first scan at 5w6d, could see hb flickering on the screen and on w7d5, can hear the hb beating v fast. so best is just get an appt w a gynae and seek for professional advice and have a scan. every pregnancy is different. take care.
Jann Loh