3 weeks 6days?

Hey all, just got my bfp 4 days ago, and I am SUPER nervous about it. I tested becayse lack of sore boobs and exhaustion. Sure enough its a bfp. However, i am finding it hard to be happy, im having cramping and all of a sudden my boobs hurt like they do beforr my period starts. its been 15 months TTCing for this baby, and my 4th pregnancy, im worried that these are signs are impending miscarriage. I have had a chemical last month. Picture of my test from yesterday. Please help wqith sqqome insight ladies!!