need some advice please 🌈😊🌈

Done a pregnancy test yesterday late morning and it come back very positive but not extremely dark second line, took another test this morning with fmu and it doesn't seem as dark as yesterday's late morning one. I have had 2 previous miscarriages and I'm trying not to get my hopes up but like any normal person it is playing on my mind. Could it be because I'm using Morrisons tests I have some FR on there way any input would be much appreciated. I'm estimated at about 4-5 weeks going from my last period.