I'm pregnant with twins & have not been through this. I haven't bled at all (knock on wood). I just have bad cramping & back pain. Good luck with everything :)
I had this with my twins and i was 17 weeks , it started off light, drs said i had nothinf to worry about that sometimes spotting is normal, then out of nowhere i felt a burst type feeling and started gushing blood, i was rushed to the hospital and found out i had hemoraged inside from what started as a very small tear turned into a 9cm hole within a few days after the light spotting started. Once i started bleeding heavy though i ended up bleeding till i died in less than a half hour, i was brought back and told that in twin pregnancies you cant really do any of the things you can do in a single pregnancy , from the moment you are having twins it can be a high risk. Keep a close eye on your body, at any point things can change from everything is okay to something terrible. Some women carry out twin pregnancies even after having spotting or trouble, some loose just one twin and carry out with the one baby.
I am not pregnant with twins but I have twins there 6 years right now but with they I had that brown discharge at 15 weeks and I finish a the ER and they told me that I was going tru a mc and they told me to bed rest for 8 weeks so that's how I got to 32 weeks until they were born good luck hope everything comes out OK for you