Phone acting weird
 

Yesterday, me and a few friends were chilling, and one of my buddies wanted to call his friend here but his phone was out of batteries. He wanted to borrow one of our phones to insert his sim card in, and since my phone was the only one that matched his service provider, I let him borrow it. After he was done and I put my sim card back in, the time and everything changed, and this morning when I received a text from someone, I clicked into the conversation but it displayed there was no such new message.

Any help here? Any feedback will be greatly appreciated!

restart your phone.