Doubtful of upt. Of 4 hours. plz guide.

Hii...i am exactly 4 weeks n 6 days pregnant..4 days ago all upt kit showed a very light pink line ..but today on testing in upt the kit shwed a fairly bright pink line than earlier although it was lighter than the line in Contol area..even my doctor has prescribed me duphaston for 5 days and told to visit her this saturday after checking upt with early mrning sample..but today just few joirs post my upt testing another kit is showing totally opposit very light pink line which camera pic is not picking up.....m worried if everything is fine..i have no such symptoms that could raise a doubt if something is wrong with my pregnancy..m feeling completely fine..then y totally negative result in a second kit..i am attaching the pic of the tests performed today with just a gap of 4 hours.plz guide..