Another 3 Days of Not knowing

This Morning i Started spotting {brownish} i called the dr and he Told me to come in today instead of tomorrow! By the Time i got to the dr. Office i wasnt spotting but Full blown bleeding! They dis Another pregnancy Test {which was positive- of Course} then they did an ultrasound. The baby is right on Track {Development Wise} but too Low in my Uterus (right bext to my cervix} Thats Not a Good sign! He Said we have to wait and See if the Baby sticks or i miscarry! They ran bloodwork {HCG,HIV etc} an i habe to call them tomorrow Afternoon to See what my hcg Level Looks like! Then i have to go in again on wednesday to get blood drawn again! And on Thursday Another Ultrasound {all that given my bleeding slows Down/ Stops- if Not i have to go to the ER for an D&C} im really devistated right now! I know that Not every bleeding means a miscarriage bur given my History i HAVE reason to worry!