Sir I have back ache and head ache and also cold and fever.my period date yesterday .but it not come did am pregnant

I am a ma'am, nor a sir. Your symptoms can be anything from a cold to the flu. Your period was only due yesterday so it is not even considered late yet. You need to wait until your period is about two weeks late before you can do a home test. There is no way we would know, via the internet, if you are pregnant.