The other thing to remember is that besides that we need to take things at our own pace, not all class units/credits are created equal. Some semesters can carry heavier loads depending on what we are taking and how one is doing, and other semesters/terms because of the nature of the classes have to be eased up on the credits/units to allow for the outside work that comes with them because there is so much with some classes more than others. Not everyone understands this, those that do are ahead of the game; some never figure this out though and plow ahead with disastrous results. You are ahead of the game already having figure this out and what you need to work for you in taking the amount of units that you can handle successfully.

Do what you need to manage your studies that works best for you because what is right for you may not work for someone else and vice versa. Those, that may be trying to help by offering advice or criticism, just take in what is helpful and leave/ignore the rest, because everyone WILL have an opinion. It is only yours that matters. Find your groove and you will do fine.