Take another look at the original sentence:
You wanted to fix it this way:
To delete the comma between problem and the would cause an equally bad problem, a fused sentence. A fused sentence occurs when you have two complete sentences joined with no punctuation whatsoever. Ursula clutched her head ... begins the first sentence. The only thing she could focus on, however, was the stupid fight ... starts the second sentence. The spot between problem and the needs a stronger break than blank space.
You might want to consult the rules for fixing comma splices and fused sentences.