I assume you're sure it's not afib because it's a regular rhythm? If so then it could be any one of about six different arrhythmias, with flutter probably being the most likely. Without a recording to look at there's no way to even guess.
You need to wear a monitor and find out what it is. Is your cardiologist an electrophysiologist? If so, I'm surprised he didn't suggest a monitor right away. If he declines to offer you one now, or he's not an EP, you need to find an EP who will treat you rather than dismissing your symptoms as emotional. (He probably wouldn't say that to a man.)
PS- A Kardia would be better than nothing, but it's impossible to distinguish between the regular atrial arrhythmias without a 12-lead ECG, so it wouldn't be all that helpful in your case.