Too scared to be hopeful

I have been TTC for nearly 2 years for our 2nd child. I found out i developed PCOS and wasn't ovulating. I was put on metformin 1 year ago and started ovulating after 6 months. I had 2 chemical pregnancies this year 1 in Jan and 1 in March. I used clomid this cycle and fell pregnant. I am so worried its chemical again. the lines are pretty faint but definitely darker than my chemicals. What do you guys think? I noticed I have a darker line in the afternoon. I know I need to stop testing so often. I am driving myself crazy!