Unexplainable gas,bloat-extended stomach

Im 19 and about 2 months ago maybe a little longer i realized that anytime i had milk or milk-like product(dairy) it would go through me in the worse way and upset my stomach. I figured since my mother became lactose at around 17 in her life-me now 19 could have it. However, not too long after i noticed my stomach bloating becoming worse and worse. My period had nothing to do with it, and if that weren't enough i've had horrible gas, and burp more. The only carbonated drinks i have are carbonated flavored water and i don't drink enough for that to cause excess gas or burping. I do eat veggies often but still-not enough for this to effect me so out of the blue. Im fairly skinny id consider avg. but the way my stomach bloats-is all out front so it looks like im pregnant(trust me im not!) the gas(which i never use to do-yeah i kno everyone does it but i did it less than average now im doing it all the time). It's embarrasing! So ive considered IBS as a possibility or maybe im having an internal allergy to something(allergies do run in my family) im just not sure. I'd hate to think im turning into an old fart(literally) so soon. Im Too YOUNG! Help me please, anyone!