The other night I was with my gf when she received a text on her phone very late at night. I started to wonder who she would be texting so late but didn't say anything because I didn't want to sacrifice any frame and come off as paranoid. She was sort of upset with me that night because I chose to hit the bars with my friends rather then hangout with her before she left on a trip to France. She was being kind of distant rather then cuddling up on me like she usually does when we sleep. After answering the text though she finally starts to cuddle up on me.

This made me really paranoid so rather then confront her I just got up, got dressed and left her place only saying "I'm going home." I did this because I didn't want to sit at her place being paranoid about her texting someone, I'd rather leave.

Here's where it got interesting. I went home and completely ignored her for the night while she was texting and calling me frantically, asking more then 5 times if she did something to upset me. I ghosted her till the next day then talked to her like literally nothing happened. She was super angry however and saying how she was freaking out and how she puked because of the anxiety (she has anxiety issues and is prescribed Xanax). We got into an argument and she was saying things like " why did you just leave for no reason, I was worried, I didn't know what I did to upset you." She called her dad when I left. She even drove to my place that night after I left, without me knowing, to see if I was home safe or cheating or whatever. She got a lot more upset about me leaving at the drop of a hat then I had anticipated.

Some things to point out: I was slightly intoxicated which might have made her worry, she's almost caught me cheating in the past, and also this was 2 days before she left for France after I said I would hangout with her for the day before she left.

My question is 1. Does her behavior show that maybe I'm not being paranoid and she really was up to something? Why would she freak out that much if she wasn't doing anything? And 2. How can I apply dread in the future without making it so obvious and making her so mad?

TL;DR I ghosted my gf for a day after I suspected her of texting another guy and she flipped out because I just left her with no explanation.