I had sex with protection on 3 June but till now I don't have periods any problem related to pregnancy?

Taking hormones can delay pregnancy. 

It's also possible that you ovulated later than you thought, and your body is just now getting ready to release the egg. You can take a pregnancy test to find out for sure.

There are also a number of other things that can cause irregular periods, such as stress, extreme weight loss or gain, excessive exercise, and illness. So it's important to rule out any other potential causes before concluding that you're pregnant. If you do think you might be pregnant, it's best to see a doctor sooner rather than later so that they can start tracking your progress and ensure that everything is going well.