gurgles

Nov 11th I started what I thought was my period. the next day it was just brown liquid that looked like coffee grinds were in it...and then it stopped completely. I took 2 tests and both came back with faint positives. The next day (the 13th) at the doctor my test was negative. I took another at night on the 14th and it was faintly positive. I've had slight nausea, I've been so tired I need a nap by 4pm and I never sleep during the day, my breasts are sensitive. I have even had a few growing pains. The problem is I started hearing gurgling in my uterus..a lot. I always gurgle a lot before my period (period was due on the 12th) has anyone ever had this issue and continued on with a pregnancy or should I prepare myself for a loss? last night when I wiped after urinating 1 time I noticed a slight pink, but it went away.