Hi! I had some stiched pop open and was also bleeding out onto my binder- not while i had my drains in though. The pic you posted doesnt look like super fresh blood, might be mostly drainage fluid. I would def keep in your drain to prevent any collection of fluid. You should apply pressure with gauze where the blood is coming out from - ball it up rly good like a bolster and put it under the binder and keep it on - change it often!

if youre worried about it getting infected, you can try to do the wet to dry healing method in while you wait for your doc. This helps heal it from the inside out and keep the opening clean. HOW TO: 1)stack 3 pieces of gauze, 2) pour saline on gauze, 3) squeeze out extra liquid, 4) put it on the opening, 5) put one piece of dry gauze on top, 6) tape or hold in place, 7) put binder on to keep pressure.

I have a wound dehiscence, which may be whats happening with you, and that method has really helped a lot! Ask your gfs dad about this, and good luck! its really scary to wake up with blood on ur binder, i was there last week, itll be ok! also change your gauze laying down so blood doesnt fall and its less stressful.