Advice needed

I’m 5 weeks pregnant. Today I had a few sharp pains. And on and off cramping. My boobs stopped hurting. Then tonight I had some light pink discharge which quickly turned to brown discharge. I’ve got low back pain.

I went to a&e.; They did a pregnancy test. It was significantly lighter than all the others I’ve done. Even ones at night. They didn’t seem to have much positive to say.i have to wait it out. Anyone had it turn out fine?