What if you ate cooked shrimp that had been in refidgerator for 7 days?

If your shrimp is still firm, not slimy, and has no strong fishy smell it should be good. However, from personal experience I would throw out after 3-5 days even if it was cooked. Shrimp spoils quickly and it is just not worth making yourself or someone else ill. When in doubt, throw it out.