5 days til my periods due, could I b pregnant ? ?

my last period was on the 26th of last month I'm due on the 23rd of this month . I had unprotected sex June 4th 5th 6th 13th 15th & 16th . I was ovulating on the 10th but idk how true the period tracker app is. what's the chances of being pregnant ? when should I test ?? what do u think ? what's the best test to get ??