Someone please answer….

So I went on Friday and got blood work done because I got 4 positive pregnancy test. My HCG levels came back at 12.. I got re tested today and my HCG levels came back to be 5. I couldn’t believe it was a 5 I thought it’d double or something because of how sore my boobs have been and more. So I took a test because Maybe a digital would say no pregnant due to my levels being so low. Low and behold it still says pregnant… I took another clear blue and it’s darker than the first test I did and also took a first response and darker as well … I’ll include my first test and the new ones I just took…. What could this mean? Please why would my test be darker than the first ones I took if my levels are only a 5 ??????? I’m so confused and have to wait for my doctor to call tomorrow. 😭😭😭