Ladies opinion

Ladies posted here before saying last week I had sex woke up light bleeding and passed a clot I believe doctor said it was miscarriage and only say a sac and measure less then it should be well she wanted me to come in this weeks now they see I believe a yolk sac and fetes pole. She said this is a good sigh but I was wondering what was it I passed I know it look like a aclot I had no pain or cramps so now I have to go back after 2 weeks my hcg levels are going up as of 5 days ago did anyone ever experience this ? I’m now 6 weeks 3 days she really thinks we were off on the days 🤔