Was I wrong here for accusing him of being with someone else?

I’m seeing this guy and he posted a story saying about when he’s with a girl he plays with her hair and back something like that. It really frustrarted me because I didn’t understand why he posted it? He said he’s sorry and that he shouldn’t have posted that? I said ‘if you’re with someone else then don’t talk to me’ and he started yelling saying he’s not with anyone else and how I’m jumping to conclusions and accusing him and how he’s not with anyone. He then took down the story. Also I’m pregnant with his child so this really upset me bu am I being unreasonable for accusing him? Why else would he post that it really pissed me off?

Was I wrong here for accusing him of being with someone else?
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