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
7 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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