Extremely Confused!

Faith

Two days ago I had two very faint lines on a First Response and a “Yes+” on a first response digital. I had cramping and spotting last night so I decided to go to the ER for piece of mind. The ER did both urine and blood tests and they were both negative!! I don’t understand. I took a dollar general test today and I still had a faint line. I also had more cramps and light brown discharge today. I’m starting to go insane over this.