My boyfriend hasn't replied in two days and I'm very very anxious what should I do?

My boyfriend works a in physically straining job, and gets busy from time to time , two days ago he told me that he's going to be busy , I told him that I I'll be here for him and that I love him and the conversation went smoothly and I slept. It's been two days since he's been online on any social media platform and I'm getting very anxious, I never know how to deal with that , I know he's busy working but part of me is overthinking and creating crazy shit in my mind and it's ruining my mood and I have no control over it.
My boyfriend hasn't replied in two days and I'm very very anxious what should I do?
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