He planned to sell MY house without telling me

So My husband just told me maybe we could sell your house and buy one together.. I said I will think about it... I found the phone number of an agent In my husband phone where he was talking about a contract that he will fill tomorrow for a visit on saturday and closing the sale on monday i was like WTF !! I was so upset ! He made those plans without even inform me... he lives in MY damn house since two years and I've worked so hard to have it... I feel betrayed.... am I over reacting ? How would you feel?