I had sex last month i.e May and my period was delayed and after 7 days i had a heavy period on the 24th which was really painful (my period usually starts from the 18th) i had it for 4 days and again we had sex before my period stop and then my period stopped with little spotting which lasted for 3 days! This month i.e June,today is the 21st and I still haven't got my periods yet, also I was travelling from 10 to 16 and I'm having flu fever since 17th (It started with a sore throat,I had lots of ice cream and cold drinks during my travel I'm coughing, having nausea, hedache, sore throat, runny nose, hot body temperature, i vomited once , Is it a sign of pregant? (We always used protection)