hacking texts

I am with Telus Pay as you go plan...i have a motorola phone and think someone has hacked my texts, can this happen?
A friend has recieved a couple texts from me but not my number...we confirmed it is my text message and from my phone everything is good. This has happened a couple of times from the same number...Am I being hacked?

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Is your bluetooth on? If so, shut it off.

I know I have a Bluetooth file explorer on my BlackJack, that I can view other peoples phones if they have their bluetooth on. I don't do this unless they know about it, but it can happen.

If not, it might just be a software issue.