Hi and welcome to the boards! Mania like symptoms can be symptoms of anti-depressants and aren't always a sign of mania. Especially since you've had only mild/short episodes in the past, I would certainly seek a second opinion. That said PLEASE don't let me get your hopes up. I just want you to have all of the information available.

Here is some information from the psychiatrist on webmd. I often post him bipolar related questions and he is fast and friendly to get back to you. I also sometimes print his threads to share with my own doctor. I hope this helps:

avatar2 days ago
Joseph F Goldberg, MD replied to monkeybee's response:
Dear Sarah.
The relationship between antidepressants and mania remains complex and still not well understood or established even by experts, and the field changes its opinion about this every so often. Current thinking is that about 10-15% of people with bipolar disorder are vulnerable to becoming manic or hypomanic from antidepressants, and about another 15% have a favorable antidepressant response to antidepressants. The remainder likely have no clear benefit or worsening of their condition. If someone has a personal history of becoming manic from an antidepressant, we think their chances of that happening again with any antidepressant are higher than if it had never happened (though some research suggests that certain antidepressants have a higher risk than others -- such as SNRI's or tricyclics as opposed to SSRIs or Wellbutrin). The risk for developing mania from antidepressants seems to be highest in people with bipolar I disorder who have mixed features, past-year rapid cycling, recent mania,drug or alcohol problems, and prior antidepressant-induced mania.
If someone starts to develop mania symptoms while taking an antidepressant and those mania symptoms go away soon after stopping the antidepressant, experts consider that to be just a medication side effect. If the mania symptoms persist in full force after the antidepressant has left your system, that's considered bipolar disorder.
Dr. G.

Here is the link if you want to see the whole thread.
"Dr. G: Anti-Depressant": Bipolar Disorder Community - Support Group

Hope this helps!