Are they definitely going to fire me?

I work in news and just started a second job in retail for some extra money. During the interview with the retail job, they knew I worked at a news station full time Recently the last couple of weeks I’ve had to call out of the retail job twice because the news job called me in earlier. The news job is my career and I’m a newbie so I’m trying to pull my weight. I told the retail job the day before that I had to call out but I felt bad because at the retail job the manager pulled me aside and asked why I keep calling out and I told her that it was because ( the news job ) called me in earlier but I would do my part to tell them enough time in advance so it wouldn’t happen again. She said she was nervous because it happened twice in two weeks and asked if it was a regular occurrence and said no everyone in my workplace was sick so I had to step up. My career comes first but I could use the extra money from the second job. One of the other managers at the retail job called out twice last week because they were sick so I didn’t think it was any different. They did tell me how much of a blunder they were in because they’re short on staff which I feel bad but it’s a lot of pressure because they schedule me almost everyday and I work both jobs. I tell them enough time in advance and both days I called out I called out the afternoon before. I’m a little worried because my career job wants me to go to a conference today ( I was also supposed to work the second job ) so I called out yet again. I’m a little nervous and worried the second job is going to fire me the next time I come in but it’s hard because I moved to a different state for my news job so it has to come first. I don't know what to do. My news director told me after it was too late that the conference wasn’t absolutely mandatory but he still thinks I should go to get experience and network. I’ve already called out the retail job yesterday and I’m worried tomorrow when I come in they’ll fire me. What do I do?
Are they definitely going to fire me?
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