confused regarding miscarriage diagnosis

hi
i just wanted to know has anyone been diagnosed a miscarriage only for it to be misdiagnosed. my dilemma is i started bleeding on saturday and went to er, bleeding was light but red and they did a uss and diagnosed me with a threatened miscarriage, er then told me to go to early pregnancy unit on Monday for blood tests to see if HCG levels were doubling. so i went on Monday but they  said its better to do another uss, they said they could dee the gestational and yolk sac and the uterus looked normal even though bleeding was moderate with mild period pains, and booked me for another appointment in 2 weeks. when saying moderate i used a maximum of a pad and a half  a day for the rest of the week till date, and strangely found that when i sat or lay down i hardly bled but when i went toilet i used to drip ( not pour)as they also suggested bed rest for 2 weeks. so here i am 1 week later and yesterday i began to clot about the size of like 50p  it did again today twice and so i went back to er and they did another uss and told me that its coming away slowly. i could see the gestational sac there and the doctor even asked if i had pictures from the last scan to compare hers too. she discharged me saying i have had a complete miscarriage but if i was to start bleeding heavier i should go back to the early pregnancy unit.
by my lmp dates i am 6 weeks 5 days today... if i go on monday i will be 7 weeks gestational age 5 weeks fetus, is that too early to hear a heartbeat?

[bummedmom]

First of all, I just want to say I'm so sorry that this is going on.  I can only imagine how confused and emotional you must be right now. I never had a misdiagnosis of miscarriage, but I did have an experience with bleeding.   I had bleeding with my second pregnancy from the very beginning, and it turned out I had what is called a subchorionic hemorrhage.  They did an ultrasound, and told me that the baby was fine, but that I just needed to take it easy and not to exert myself too much.  I wish it were this simple for you. I completely understand why you want to make 100% sure that it hasn't been misdiagnosed.  I also wanted to tell you that with my first pregnancy, we heard her heart beating on the ultrasound at 6 weeks gestation, and for my son at 7 weeks. I think that 8 weeks is pretty typical to be hearing it for the first time though.  FYI.  Best of luck to you.