Worried about miscarriage


Hi there! So I'm 5 weeks and 3 days pregnant and I know these tests are very positive but I'm just worried as the test line doesn't seem to be pulling as much colour from the control as it did a few days ago. The top test was 4 days ago, middle one 2 days ago and bottom one this morning. All FMU. Worried that it looks like the lines will start going the other way and the test line get lighter! So worried as I had a chemical in January.