On the day I was suppose to get my period

Patient: On the day I was suppose to get my period I got spotting instead and the spotting has lasted for almost 4 days now. Could it be implantation bleeding or just an irregular period?

Symptoms: One day I was nauseous and had a fever and a head ache and was on the verge of getting a cold sweat, and I got a throat ache but the day after I felt fine, still had a little bit of a headache and my throat still hurts but that’s it

Doctor: