Take another look at the original sentence:
You wanted to fix it this way:
A comma splice occurs whenever you join two complete sentences with a comma alone. Ursula clutched her head ... begins one complete sentence. The only thing she could focus on, however, was the stupid fight ... starts a second complete sentence. Just because you add a transition like consequently doesn't mean that a wimpy comma can now correctly connect two complete sentences.
You might want to consult the rules for fixing comma splices and fused sentences.