Concerns w/ late period

My last period was May 21. Its always comes 4 days later the next month so I was expecting a period June 25. June 24 and the following week I had menstrual cramps like normal but its now July 5 and no period. I have had it skip and the begin @ the beginning of the next month twice before. I’ve had protected intercourse….checking for pre-sperm before putting the condom on, using a spermicide condom and pulling out before ejaculation even with using condom. Now I’m just worrying myself sick. Any information and advice is welcome.