I'm in the same situation, so I know how tough this issue is. I don't know how many sessions you've had, but I thought maybe if I waited to see if I could develop more trust over time, I wouldn't freak every time I teared up. Though I still haven't cried in session with my T, I'm more comfortable with the idea that if I do, the world won't end and I won't look like a fool. Maybe telling your T that you're not sure yet whether or not you can trust her would help. I told my T that I didn't trust him (in my first session) and he's been, I think, trying to build trust from his side.

{{{Hugs}}}