6 weeks and passed a huge clot scared!

So last night out of the blue I felt a big gush in my pants so I go to the toilet and my undies are soaked with blood and there’s a huge clot in the toilet but I am not having any cramps or discomfort at all so I rush to the ER. In the Er they check my urine to confirm I’m pregnant so they take blood and send me for ultrasound but because it’s ER the ultrasound tech says I can’t look at the monitor and she can’t tell me anything 😡 the ultrasound lasts almost 45 min and I can hear her taking measurements which gives me hope. Once I’m back in my room with my husband Dr comes in and says ok there is a baby in the uterus measures about 6 weeks but it’s too early to detect heartbeat with that machine so we will wait for hcg. After a few hours nurse comes in says hcg is 13,500 which is great so far pregnancy is thriving but I have to go back and have another ultrasound and blood draw in 3 days. Bleeding has slowed to a light spotting and still no cramps but I’m nervous please pray that things still look good when I get the next scan and blood draw.