I'm emotional what the heck is up with me?

I just started crying out of the middle of nowhere my husband swears im pregnant im so calm so horny what is going on im not due for of till the 15th and i ovulated last week had spotting for a day and a half last night and im tired all the time and hungry constantly is it a sign of early pregnancy when should I test or what is wrong with me ? I've been watching baby videos and shows and im not normally like this