Could it be???!!!

Im 4 days late for AF. That means I'm about 2 weeks DPO. :) I took a digital 3 days before expected period and it was negative. Which in turn, I was told digital takes a little longer and more HCG to detect. Yesterday morning 2/15/2020, I was going to Walmart to get one of the cheap ones. Well to my surprise all they had was Clear blue. I left and went to family dollar, they didnt have any either. I wake up today and I'm crampy, not like period pain, in both my sides. Just like dull achy cramps. Could it be a baby growing? I have the other digital test with me, but I'm not sure if it will pick up on hcg just yet. Should I wait until I get a cheap test or should I try the digital again?