Hi - see my post from earlier in the week. At 5w4d I too had bleeding, cramping and clotting like you describe. I went in the next day for and ultrasound and they confirmed not only a sac, but a sch bleed as well. Although very early, we did see a heartbeat, but either way seeing the sac helped as well as seeing the bleed. It can be very typical of ivf they said. It can be ok - just get in for a check when you can for your own piece of mind. Keep believing!!! We are here for you!!!