I have never phoned my T, but I have/do text sometimes if I'm feeling unsettled. He always gets back to me, but not usually until the following day. I try not too now, but always tell him that I wanted to, but didn't. I'm just trying to hold my stuff until I see him again next session. Because I see him twice a week, I don't have too long to wait.
If you 'need' to text/phone/email, then do so because there will come a time, when you won't need too.