at home tests, second line blurry?

emg2010

Since I found out I'm pregnant, I've taken a bunch of pregnancy tests. Yes I know I'm being crazy but at first I couldn't believe I was so I took a bunch. I'm around 4 or 5 weeks. Last week I  was extremely tired, had light cramps and my boobs were very sore. I've noticed that last couple of days I haven't had those symptoms. So of course I got all paranoid and took a test this morning. The second line showed up but it was faint. It was there but not as bright as the first.

Does that mean anything? Am I worrying too much? I'm sorry for the silly questions but this is my first pregnancy and I'm so excited but really nervous at the same time.