Could I be pregnant?

So my period is now 3 days late. It’s usually regular and usually comes 1-2days early. There has been no spotting. I’ve had an increase in vaginal discharge, really sore boobs for the past two weeks, now they feel a little better but are veiny. I keep having a stuffy nose. Even if I sleep a good amount I still feel tired. I can’t sleep through the whole night, I wake up periodically. It always takes me a long time to fall asleep-recently. I’ve had really little cramping on and off for the past few days ( my period cramping Is usually painful). I’ve also been having really emotional dreams about my boyfriend forgetting who I am. Sometimes my belly starts to hurt and it feels like I’m gonna throw up. I do have unprotected sex with my boyfriend. Please share your thoughts! I have never been pregnant before so I’m completely lost here and I need to know if I should spend the money on a prego test.