bleeding - placenta previa

hello ladies! I just need some help please.

1 week ago I ended up in hospital with a massive bleeding. they told me the placenta is marginal and I am on bed rest since. They gave me steroids shots for the baby lungs as they mentioned another bleeding will probably happen again and to try to keep the baby at least 3 more weeks (currently I'm 30 weeks). so scared every time I go to the bathroom not to see another bleeding. I just want my baby to stay as long as possible and to come healthy. Did any of you experienced bleeding? any advice will be much appreciated!