Pregnancy Test Lighter

I'm currently 7w6d pregnant. I have my first doctor's appointment this afternoon so this morning I used my second urine(I forgot to use FMU) to take a Wondfo Pregnancy Test just to make sure I am still pregnant(I had a missed miscarriage in April 2015). The test came out super light and this worries me. Last time I took one at 5w3d and it was super dark. My temperatures are still elevated and I have not spotted nor had any painful cramps. Am I looking too much into it?