SIS aka SHG Ultrasound

Had my SHG Ultrasound (put saline in your uterus and do an internal ultrasound) on Tuesday and Uterus is healthy ovaries are cystic (I already knew that). So the thing is when I left the office I had slight spotting which he warned me about. Clear all day Wednesday. Then Wednesday night I noticed slight spotting again right before bed. Now all day Thursday and today I’ve had heavy bleeding like a period. I tried calling the office Thursday they were closed all day for training. I called this morning the receptionist transferred me to a nurse on staff who didn’t answer the call. So I left a message. Called back 3 hours later to see if I could talk to someone else and their office closed 2 hours ago 😩 I don’t have any pain or cramping I don’t have a fever. I’m pretty confident I’m ok I’m just not sure how typical this is. Has anyone else had a similar thing happen?