Causes of a stomachache

I called an ambulance because I had strong pain in stomach last week.
I went to see the doctor to hear the results of the checkup.
But there was no problem to report.
I guess I ate something funny, I don’t know what it was though.

腹痛の原因

先週、あまりの腹痛に救急車を呼びました。
その時の検査結果が出たので、病院に行ってきました。
しかし、結局原因は分からずじまいでした。
何かの食べ物にあたってようですが、詳しい事は分かりませんでした。

修せないよう

Causes of a serious stomachache
→serious 不要

I called an ambulance because I had a serious stomachache last week.
→serious 不要
ものすごくお腹が痛かったという意味なら、because I had a strong pain in stomach など。

I heard that the test result came out, so I went to see the doctor.
→I went to see the doctor to hear the results of the checkup

But I didn’t know the cause of a serious stomachache.
→but there was no problem to report.

I seemed to be food poisoning, but I didn’t know the details.
→I guess I ate something funny, I don’t know what it was though.