- I have had IBS for 20+ years and have been in a similar situation in the past. I worked full time while working through my entire undergraduate and graduate degrees, most of which took place on campus or at hospitals/outpatient centers for physical therapy. I worked in some higher stress situations with odd hours, little time for preparation, and constantly changing environments. I completely understand what it's like to feel overwhelmed and have no idea where to start to make changes. As the other commenters have mentioned, diet is usually the first place to look to make changes. Keeping a food journal is one of the easiest ways to figure out what your "trigger" foods are and when you need to avoid them. I kept a food journal for over two years, and now I generally know what foods are considered safe for me to eat, and which will provide me with an unimaginable amount of gas, bloating, and ultimately untimely diarrhea. When you do figure out what your trigger foods are, plan out your meals accordingly. When I was officially diagnosed with IBS, I quickly realized that it was going to be in my best interest to become a master planner. If you have a generally set schedule, plan out your meals around your schedule. Those of us suffering from IBS don't have the luxury to be able to eat whatever we want whenever we want without worrying about the negative digestive effects afterwards. So plan out your meals based on your daily activities, not the other way around. This will also likely mean giving up some of your favorite foods, in exchange for piece of mind that you are less likely to s#!t your pants when on a stressful call as a paramedic.
Being in the healthcare industry, and more specifically in an emergency response role provides it's own set of challenges, even without taking into consideration living with IBS. Stress is generally a huge trigger for many that suffer from IBS. When you are in a higher stress field, you will need to focus more on managing your stress levels and providing your body and mind a good balance that is capable of handling any stressful situations that arise. For stress and anxiety, I think practicing meditation is extremely beneficial. Meditation can help you become more aware of your body's reaction to different situations, and over time you can learn to adjust the way you view those situations, and ultimately lessen the negative effects of your IBS that are caused by stress.
Lastly, I would work on creating a "go bag" for when you are on the go. Anyone I personally know that suffers from IBS always has their "go bag" on them whenever they leave their home. This includes the essentials such as toilet paper, underwear and an extra pair of shorts (no explanation needed). You will never have full control over when and where you might find yourself in an unflattering situation, but it is always a little more comforting to know that you have a back up plan anywhere you go, just in case you need it. Living with IBS is not easy by any means, but with a few adjustments to your current lifestyle, you can achieve anything you set your mind to accomplish, including finishing your training as a Paramedic. Don't give up now, the world needs more unselfish people like yourself! Just remember that sometimes you need to focus on yourself first before you can put all your attention and effort into helping others.