first response not getting all that much darker?

I'm worried because every day for the last five days the tests have looked more or less the same... has anyone had this and had it NOT be a chemical pregnancy?! I'm so nervous, and I'm driving myself crazy with testing. I know i should stop but I'm sooo worried. this baby was so hard to conceive and came to us at just the right time, we have already expirienced a great deal of death and loss in 2018, I'm scared this is the next thing... most of my tests have looked like this one the entire time, with the very first one at 10 or 11 dpo as a very faint positive. tell me everything is going to be ok! had blood done on Monday, that was hcg 78. I go in on Friday again to make sure it has at least doubled.. *the test in the picture was from today, at 14 or 15 dpo in the afternoon