My Period Is Longer Than Usual

Help !!? This Is New To Me But Okay First Thing's First My Periods Are Usually 
4-5 Days Long And Boom It Ends .. Plus It's 
Been A Little Irregular Since I Had Sex . Which Was When My Husband And I First Had Intercorse . Than It Switched To Being Constantly Around The 20's But Now It Came Earlier Like Maybe 2 Days Earlier . 
We're Very Sexually Active And TRYING To Concive . We Have Been Together For A Year & 3 Months . And Getting Married Very Soon . 
ANYWAY .. My Period Lasted Longer That 4-5 Days & A Day An A Half Extra ?? 
I Just Wanna Be Sure Cause It's Freaky 
I Don't Wanna Find Out I'm Pregnant Now Since I Am Doing Hard Core Exersices And Dieting . And Afraid It Might Hurt The Baby IF So . Just Incase Ya Know Rather Be Safe Than Sorry .