First of all how old are you? To take enzymes you don't need a prescription. Changing your diet will help but it isn't the only thing you have to do. You can first change your diet and then add enzymes if that doesn't help enough. I can no longer have the things I love, like cookies, pizza, burgers etc. because no matter how many enzymes I take I can't digest the fat. It causes me pain, gas and sometimes even constipation. Your condition is moderate, try not to worry. Consider yourself lucky having constipation instead of diarrhea. The first thing you need to do is pay attention to what you eat and how much. Keep a journal. The diet I am on is more extreme then you will need but I'll give you the general idea.
You diet should mainly consist of good fat that means you need to stay away from cheese, fried foods, desserts, hamburgers and fatty meats, snacks with fat, dairy products like yogurt uless fat free. Fat is difficult for your body to digest. The fat you should take in is omega 3 in capsules and virgin olive oil for stir frying or salad dressing. You need to add fresh veggies to your diet at least two times a day. Eat raw carrots or celery and fat free ranch dressing with them as a snack. Salad for lunch with some grilled chicken and add some dried cranberries, slivered almonds, baby spinach and Ken's olive oil and vinegar (healthy options) salad dressing. When you eat carbs like bread you need to eat whole grain and you need to cut back. Try to eat bread only once a day. With this diet you decreased your carb intake and your fat intake. You will feel hungry all the time and want to snack if you don't eat protein with every meal.
For example: eggs, oatmeal with nuts, peanut butter on on toast or cereal with high protein for breakfast. For lunch: soups with beans or chicken, salad with chicken and or nuts, chicken or turkey sandwich with lettuce and tomato on whole grain bread. For dinner: pasta if it is whole wheat, grilled salmon or grilled chicken with steamed aldente veggies or stir fried veggies. The other very important detail is that you have to cut back on sugar. Stay away from sodas. Drink at least 5 8oz. glasses of water a day. Your body could be dihidrated from to much salt and not enough fluids causing you constipation. If you find your digestion hasn't changed for the better after being on this diet for a few days then get back to me.