I Had Sex With My Gf On 24 Th May

I had sex with my gf on 24 th may and again on 25th and 26 th may she was having her periods cycle from 21stmay till 27th may but on 24th after sex her bleeding stopped and sex was also protected but on 25th and 26th it ws not protected but i made sure nothing is released inside and on 27th she had ipill and again her periods started on 28th may till 3rd june.
She was suppose to have her periods now on 3rd but till now she is not getting down and there is no sign also
Just a little abdomen pain and little stomach and hip pain
Now she is concerned is she pregnant or not