Relationships

Should I be worried that he hasn’t texted me back?

Me and my ex have been broken up for about 2 months and have decided that we want to try to rekindle our relationship. We did no contact to give each other space and time to heal. He has been the one to initiate contact and call me.
About 2 days ago we had a fight but we talked it out and gave it each other space for the rest of that night. This morning he texted me and said “hey” and that he was at work and wanted to call me on his lunch break because he was upset about something at work. He never called me on his lunch break so I texted him a few hours later and said “I’m just checking in to see if everything is okay?”
It’s been 3 hours since I sent it and no response. I’m trying not to over think. It’s not a big deal right? I don’t want to call him because I don’t want to Blow up his phone.
Should I be worried that he hasn’t texted me back?
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