Hook effect and spotting? Or..?

RL

Yesterday I had light to medium cramps and a bit of brown spotting, then some pink spotting. This morning the cramps have gone but I have more brown spotting (more than yesterday). Also I've been doing cheap strip tests because Iike to see the hcg levels rise, and today I've got a lighter line :( I always test at the same time with fmu.

I'm 5 weeks 5 days, first pregnancy. Do you think this is just harmless spotting and the hook effect or am I going to lose this?

The first picture is 2 days ago before the spotting, the other pic is this morning.