Boyfriend not replying me after he had a surgery?

My boyfriend had a major surgery and after the surgery he isn’t replying me (stays online all day) I want to be there for him, what’s happening to him?
Long distance relationship, brain surgery, I want to be there for him, I fear calling because its still so new and he hadn’t even seen my texts. He stays online all day. Help me out please.

Updates
10 mo
(Any guy, girl who went through such situations or surgery please help out)
Boyfriend not replying me after he had a surgery?
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