Positive now a negative ????


So this morning first morning Urine I tested and it came up positive straight away on a digital! I tested about 2 hours later and got negative I’ve just been to the chemist and got another test - clear blue digital and it said not pregnant on the screen but below is the picture of the strip? Is this not positive? Shall I test tomorrow with first morning urine again and if it’s positive go to the doctors??? Thanks in advanced xx