Praise be to Allaah.
Firstly:
We congratulate you for the blessing that Allaah has bestowed
upon you and for now wearing hijab which is the symbol of virtue and
dignity, and we ask Him to help all Muslim women to do likewise.
Secondly:
You do not have to change these pictures, because usually
they are kept inside files for the time when you are at the college, and no
one looks at them.
And Allaah knows best.