Ttc early period and nausea

Im ttc my first child.... im 28 years old and have been on the pill a while i came off it in november i had my first period on 7/2 /15 i was not due back on till 9/3/15 i however have come back on my period on 2/3/15 i feal tierd and sick all the time and are peeing quite alot is it possible to be pregnant or is my cycle just trying to regulate its self? We had a lot of sex around the time i should of been fertile