Confuseddd

Hi so I have been feeling nauseous for the last few weeks. I was supposed to start my period Sunday but instead I have had headaches, backaches, stomach cramps, and tiredness. It is now Wednesday and I have had light brown discharge and spotting. I also normally get one zit right before I start my period and I have had like 6 and a cold sore (which I never get) all within the last two weeks. Anyone have any thoughts? I haven't taken a test yet because I'm waiting to see if this spotting will turn into my period but even then I'm like 4 days late...