Honestly, you have to make time, and soon.
You could be pregnant if you had unprotected sex and if your period is late.
No one on here can tell you if you are pregnant, only a pregnancy test and a doctor can tell you that.
Are you late?
Did you have unprotected sex?
If these things are a yes, you could be pregnant. But no one can tell you that you are on here.
Get a test, and test with the first morning urine, and you should/most likely will get an accurate reading.
Your 19, if your old enough to have sex, your old enough to take action now.