I Am 32 Years Old. I Have 2 Children, 6

I am 32 years old. I have 2 children, 6 and 3, both c-sections. I have had all the symptoms (nausea when eating, head ache, back ache, smell of meat puts me off completely, feeling bloated, heartburn etc) as you would during pregnancy. My period came 4 days early and it only lasted 2 days. It stopped 24 hours and started for only 1 hour the following day. I have done a pregnancy test on the day my period was due, but it is negative. Should I retest later on or could it just be my hormone level?