Hi mum, I'd say this one better not wait - please go see your doctor or A&E now to get it checked out. Brownish discharge in the second trimester needs proper assessment even if it's just a small amount, so the doctor can make sure everything is fine with your baby and placenta. Wishing you all the best.
Hi, there, Mom! Given you’re in 23rd week, this kind of discharge can be caused by few things, to get proper evaluation and peace of mind, contact your OB/GYN.