Should i be worried?

Let me start by saying this happened while being on birth control. I found out on Friday that my test was positive. Should i be worried that it isn’t getting darker? I took a blood test and my levels were 40? I just had a period on August 24-29 so my doctors and i are so confused. I’m also having spotting today and I’m not sure if it’s because my husband and i had sex this morning or something else. The picture with 4 is from Friday , the picture with 1 is from right now 😔

Thoughts??