Brown spotting early pregnancy arounf 4 weeks.

So I took a test Wednesday got a faint positive then again yesterday a little darker but still faint. I had some gas pains last night some cramping, got a little nervous because I didn’t like the cramps I already miscarried around 4 weeks two months ago. I woke up today not many cramps. I took another test fresh urine and it was positive but not as dark as yesterday. Idk if it’s cause I had a lot of fluids yesterday after I took that test or if I’m in the middle of a miscarriage but the brown blood is freaking me out that’s how it started two months ago..brown to red. :/ chemical pregnancy. I had it with my daughter but I spotted with her around 6 weeks…