6 wks. pregnant weird discharge

So, yesterday when I was lying in bed I felt a slight wetness on my underwear thought it was pee or blood and I got scared ran to the bathroom no blood I was relieved, but then I wiped and got some like brown stretchy, stringy mucous like discharge and I'm worried it's miscarriage had lower back pain but no cramping and today went walking came back went to the bathroom and got the same discharge but now it's more 😞 can you ladies give me any advice, am I miscarrying?? I took a pregnancy test & the lines are still dark but they say that usually your hormones take a couple weeks before they go back to normal