I am hearing you Kyliewylie - its a horrible feeling. My DD had colic quite bad and we were constantly told its normal, she will grow out of it. Later on, we found out that she reacts to green veggies. Once we figured that out, the colic basically stopped.
Tomatos have lots and lots of chemicals in them, so it could well be effecting your bubs. The chemicals are natural, I don't mean like added stuff - just that the natural ones can cause reactions (so I've learnt - lol).
I think to start with cut out the commonly known colic causers - any food that causes you gas basically. See how bubs goes after a week or so like that. Hopefully the colic will settle down. If so, introduce one food (in moderation) back into your diet and see how it goes. That might help you narrow down what might effect your bubs (handy for preparing for solids too).
I find any-thing in excess will disturb DD to a degree, like my afternoon binge on liquorice the other week.
Best of luck Kylie - I hope it all settles down soon.
DD is 3yr 8 months - DS is 6 months