I need ADVICE!!

Cassandra

So today is 5 dpo and I'm having cramping, nausea, hot flushes and I just went to the toilet and I had some slightly light brown tinged creamy cm on my underwear. The creamy cm started yesterday but the tinged cm was now... What does all of this mean? I'm only supposed to start my period on 21 October (crossing fingers I don't) but surely I can't be getting a period so soon... HeLP