Driving me mad now

[Bbybump16]

So Friday I started having brown discharge but doesn't look like the snot or what I would class as plug since then I've had terrible pains in the lower of my tummy hips and back there not bh because they are painful but my belly doesn't really go that tight ? Sometimes the pain is just an ache then ill have an hour of really bad pain , I'm starting to think maybe water infection :s it don't sting to wee but I've had one before with no stinging :s I'm a confused lady !!