I dont know if my gf is cheating

Yep, changes in behavior like that could be a warning sign. But there are other possible explanations. Perhaps she feels the need to upgrade her appearance at the new job?
 
Lately my girlfriend started uploading sexy photos or with sexy clothes, showing her legs or her lips, she never did this before so it's kind of weird, she started doing this since she started her new job, and now I'm wondering if she He will be looking for something with a coworker
Maybe some one at work
 
My wife had an affair at work. She changed they way she dressed. She started to talk more about her lover. Her lover was another woman and I didn't suspect anything, They were spending more and more time together. We didn't make sex for months (actually I had also a mistress at that time). One they she left her phone in the bathroom and I read her chats with her female co-worker. They were much more than friends.
If I could only be that lucky. That is so hot