Venous Lake In Placenta???

I went to the ER last night for some bleeding that I was having.

They did and ultrasound and my baby was in there active and with a strong heartbeat. I am 16w3d but after ultrasound was told Im 17w1d.

The venous lake in placenta was said to have caused my bleeding. and to follow up with my doctor on Monday. I was in the hospital until 4am and at 1030am I had some more blood when wiping.

Im just still a little freaked out even though I saw my baby strong and healthy.

Has anyone else been through this???