When to stop worrying??

Hi all! I had a chemical last cycle and found out almost a week ago I’m pregnant again. My lines are getting darker (for reference this pic was from this morning) and I am currently 15DPO. Because of my chemical, I’m so crazy anxious to the point where I haven’t even told my husband I’m pregnant again. I want to tell him today since I officially missed my period, but need some reassurance that I can relax a little before I tell him.