Good for you to try to increase oats! Very healthy and good for everything in your body! 

I agree with Patricia on the probiotics. I would encourage you to try suppliments as they are easy to take and you know you are getting enough.  I  would also ask you if you are drinking enough water.  You should be drinkin at least 64 ounces of water....not gatorade or other 'fluids"... just water.  Fill up a 32 ounce pitcher of water and keep it in the fridge.  You should be drinking a liter (32 ounces) by lunchtime.

Also, what else is in your diet? Excess dairy can cause intestinal bloating and gas as well. 

Good luck! The time it takes to fix your gut will be worth it in the long run! 

Patricia and The Savvy Sister have both answered your question perfectly. One of my ways of increasing my consumption of probiotics is to add a couple of tablespoons of Greek yogurt (I'm tolerant of dairy, so this only works if you can digest it) on my oatmeal, it not only adds a probiotic, but also protein and calcium. I also find that if my portion of oatmeal is too much it can cause gas and bloating, so I keep the portion quite small (1/2 cup uncooked) and also add some chopped almonds for extra protein.

I just have one note to add to the great suggestions everyone has added. Lately I have seen an increase in people who seem to be reacting to grains. I would not call most of them allergic to grains, but seemingly there seems to be a sensitivity. Wheat can often be the cause. I make sure my oats are wheat free, which helps eleminate the possibility of that being a problem. The other suggestion is that many people don't know how to properly prepare oats so that your body can absorb their nutrition. Here's the old school way your great grandma would make oats: First you take the oats and toast them, on the stove or in the oven. Then to get more of a smooth oat cereal I then grind it in my blender. The next step is you pour the oats into a bowl and add double the water to oats. Then add a tablespoon of lemon juice or yogurt and leave overnight. This soaks the oats and gets rid of the phytic acid which can cause absorption problems. Also they taste super yummy like this. If you're in a hurry skip the toasting and blending and just soak overnight. It makes the cooking time quicker as well. In health, Amanda