Depo and bleeding

So I had sex last, 2 months ago, he didntpull out. But I am on the depo shot.

From September7th-14th I bleed all week straight. Super light. Dark brown. Enough to where I had to wear a liner. And I had cramping.

I took a pregnancy test the 17th, a $1 test from dollar tree. It was negative.

The past 2 days ago I started cramping in my upper abdomen. Bloating in my upper abdomen.

Tonight when I wiped after using the restroom, I noticed a light brownish discharge.

Should I take another pregnancy test? Does this sound like preg. Symptoms