Hello, Are you separated from parents ,staying in a hostel or boarding place ,in which case it's quite normal.But if the worry is excessive and makes you avoid your routine ,you are bordering on anxiety.Meet your parents often and ,meet a psychiatrist with parents .

It is also called as Adjustment Anxiety. I understand  that leaving parents after 18 years is difficult.... At the same time,  your parents would be proud and you make them proud is by the only opportunity is by your success. Do you want them to be proud about you or not?!!! Talk to them everyday,  Whenever you visit them,  do all those services which you didn't  earlier.