ya you can get in trouble ..... you might fall out of status if you drop classes.....its all up to the DSO .... so it's better to talk to your DSO clearly and tell him/her your problem......if you are thinking of traveling  inform your school and fill out the withdrawal form and a new I-20 for travel....take it with you...... and carry it with you while you are coming back...... this way you will be reinstated automatically.....