Difference between if there was and if there had been

Hi, experts. I hope you to help me with this question.

My question is this...

What is the difference between the following two sentences?

1. Perhaps if there wasn't all the brouhaha, he may not have been so emotionally drained.

2. Perhaps if there had not been all the brouhaha, he might not have been so emotionally drained.

Thank you in advance.