No one on this planet could tell you over the internet whether this is always too much for your body to absorb in one sitting. If you weigh about 170lbs, I would divide your intakle into smaller portions just to be on the safe side. I generally take in about 50gr or more in one sitting but I also outweigh you by quite a bit.
Beyond that, you need to plan better. I have always found a way to get extra meals in even when I was still in school. I plan ahead. I truly don't understand those who claim they NEVER have time. All of my meals are prepared the night before. I get two meal replacement shakes and one soilid meal down at work alone. At least 3 other meals on top of that outside of work.