Everything is probably okay, so don't stress.. stress is bad for you and baby. Easier said then done I know. Go to the doctor though or atleast call your doctor and explain whats going on. You aren't suppose to bleed in second trimester, but some people do and go on and everything is okay. Better to be safe then sorry though.
I did right about that time called the ob nurse she said brown is old blood and as long as there was no red then it was fine
I'm 30+4 and I had brown discharge the whole pregnancy.
Brown is usually old blood. Try not to.worry. Seek.medical attention if it turns pink or red