Help?!

Ch

The left one is the test I took this morning. Is it normal to still be faint? I've got blazing positives on 2 other test (first response early result & Walmart early result) yesterday. I know HCG is supposed to double every 48 hours so can someone help put my mind at ease? I was thinking of going to the hospital for them to do blood work since I don't have insurance right now & not sure when I will get to the obgyn to give me some reassurance.