Is this a bad time to start a new business?

It is not necessarily "bad," but it requires a different strategy. Conventional "aggressive" launches may struggle. Instead, focus on businesses that involve healing, the arts, or spirituality, and ensure your timing is guided by intuition rather than just a spreadsheet.

Why do I feel so tired during this transit?

The planet of energy is "dampened" in Pisces. You aren't losing your drive; your body is simply asking you to move at a more sustainable, rhythmic pace. Rest is a productive act during this time.

How does the Mercury retrograde affect this?

With Mercury retrograde in the same sign, there is a "re-evaluation" happening. You may find yourself revisiting old arguments or re-taking actions you thought were finished. Patience is required as the "plan" may change several times before the transit ends.