It was about ‘89 that we had our carpet cleaned professionally for the first and only time. About the same time we used a different bug bomb. We were sick all the time. The doctors couldn’t figure it out. Strange thing, when we were out of the house for several hours, we’d feel better so after sitting in the doctor’s office, we’d be fine. It took months for us to realize it was the house. Don’t know if it was the carpet cleaning that smelled to high heaven or the bug bomb. I cleaned the carpet with vinegar water and either it got out the insecticide or the carpet funk or both but the sickness went away after that. It was 26 years before we used bug bombs again but that was a have to with a flea invasion. The carpet is in horrible shape but I’d rather clean it when I can than hire it done with who knows what chemicals.
I think I would rip out that carpet if I were you.
I finally pulled out all of my carpet and put in laminate floors. I put large area rugs in the living room and dining room on the laminate. Best thing I ever did to this house.