Pregnant looking after I eat....

The best thing to do would be to go to a doctor and get checked out for food intolerances.

The second best would be to eliminate one suspicious food at a time and try to figure out what things specifically are bothering you and cut those foods from your diet.

You could have a separation between abdominal muscles. Go to google and type in Diastasis recti. It's normally found in women who have been pregnant, but it can happen to anyone.

Now that i think about it, can you feel the separation in your stomach muscles?

Yes, you can. If you lay on your back, bend your knees... then slightly lift up your head, at that same time, take your fingers (1,2,3 etc, however many you may need) and push down right above your belly button. If you have it, you will feel the muscles grab onto your fingers like a clamp (so to speak). I have it, and I can fit 3 fingers in my gap.

Oh boy.....That might be it... = / I'll test this out later and tell you if I feel it or not...

Does this mean I'm doomed to never have the tummy I want? = /

No, it doesn't mean you are doomed. There are specific exercises that can be done, or surgery. I looked at your pics, you have a different looking stomach than I do. Mine is on the upper part of my abdomen. I have also lost 100lbs, and have 2 children. I have 2 recent pics I took last week to show what my stomach looks like. I am 5ft & 120lbs looking like I'm 6 months pregnant....