7dpo, breasts grew 2 sizes and feel very heavy

Hayley
My breasts have grown A LOT....they've gotten wider and fuller and my aereolas are much larger and have very visible Montgomery Tubercles. I've also had light brown spotting for a few days now, head rushes when I stand up and frequent urination. My last period came 4 days late and only lasted 2 days. I still have not tested but I'm thinking I should... Any thoughts?