rainbow

So we had a miscarriage last year june is when we found out we lost it am scared to be pregnant again I know I shouldn't be but I can't help it I took a test like 4 days ago the line was very faint and I retested today when it was 1day before I can test the line is more darker but still faint so am worried the last time I was pregnant the line was dark popped up no problem so I'd this something I should worry about or is it normal