Miscarriage?? 🤷🏻‍♀️

So buckle up. Same sex couple, been trying for 5 years to get pregnant. Countless IUIs . Finally decided on <a href="https://glowing.com/glow-fertility-program">IVF</a>. First transfer was a success. At about 5w4d I began bleeding heavy and passing lots of large blood clots. Thought we lost the baby, went in the next day and the dr did an internal ultrasound. She could see the sac and the yolk sac, not the embryo but told me that it’s pretty normal at that timeframe. So I’m scheduled again for Thursday. On Friday after the ultrasound they took blood, told me that my HCG levels were climbing normal ( HCG was 2584). I’ve been taking pregnancy tests since yesterday all day positive but the line is super light. Could I still be pregnant or is my HCG just going down because I did loose the baby??