Late period negative test

Nichole • Due 11/19/2018, mc Thanksgiving 2017, mother of one, Herpes positive, amazing man
So iv never had a late period and have had my paraguard IUD in Feb will be 7 years. The past week and a half my boobs have been swollen and hurt at this moment my period was supposed to start monday, today I had very little spotting only when I went to the bathroom I took a test at about 240 pm and it was negative but my back hurts tummy aches boobs hurt trying to figure out what's going on