Sayang, for something like this, placenta previa with bleeding, you really need to follow up closely with your OB, okay? Don't rely on online experiences, because every pregnancy is different and your doctor needs to monitor you properly at 29 weeks.
I know it's scary, especially first time, but keep all your appointments and go to A&E right away if you bleed heavily. Wishing you all the best, this is one situation where your OB is your best guide, bukan online mummies!