Take a test. No one here can tell you if you're pregnant or not.
Yes your probably pregnant be sure to stay come and tell the baby daddy relax
Irregularities with your period is not unusual even without pregnancy, but if you did not use protection you should absolutely test yourself for pregnancy just in case.
Remember in the future to never rely on your cycles as an effective method of birth control, since as I mentioned, period irregularities are not uncommon. And condoms protect against more than just pregnancies, right? c: