Thinking i might be pregnant

My periods are irregular. My and my so had sex everyday this past week. I believe i ovulated the 14th and on the 15th i had some spotting. My boobs hurt like hell. My so tells me how heavy they feel now and how differently my nipples look. Ive been a little emotional too. Ive had 3 kids so far but none of them were ever like this. But i also know that every pregnancy is different .