If i am 2 days late is it ok to take a pregnancy test in the afternoon?

Yes: It could be positive even before missed period

Yes, but if: it is negative, it may be too soon. The reason for recommending testing in the AM is that there is a higher concentration of HCG in the urine then, making it more likely to pick up a positive test. If the test is negative and you still don't get your period in one week, you should do another test (preferably in the AM).