I had protected sex Friday for the first time, the condom didn't break or anything. My next period is supposed to come on the 19th of this month I was just wondering will it arrive on time and is there a chance of me getting pregnant ?

Every time you have sex pregnancy is possible. There is no form of birth control that is 100% effective, and condoms are one of the least reliable forms of birth control.

There are women on this site that used 3 forms of birth control, all used correctly, and still became pregnant. So yes, there's a possibility that you're pregnant.

As for your period. Sex won't mess up your period, unless you're pregnant.

Will your period come on time? We can't answer that question.

Is there a chance of pregnancy? Yes. There is no form of birth control that is 100% effective aside from abstinence.

Unfortunately you are now playing the waiting game and have to wait to see if your period comes when it is due.