2 year anniversary and pregnant!

Today is my bf and my anniversary (2 years). I cooked for him and plan on giving him a massage later tonight. All he said was "Happy anniversary" all fast before he went to work today and hasn't talked about it the whole day. Should I expect something from him, or just pretend it's a regular day? He has been getting mad a lot lately and I have a feeling that if I say down thing, he's gonna get annoyed.