6days late 19dpo

At 16dpo I took a test it was negative, been experiencing small cramps, back aches, tingles in my legs and now I'm 19dpo and experiencing shooting pains in my breast and lightly cramps on and off! Could I still be pregnant? I never missed a period ever in life I did have sex on ovulation which was April 8th and my period was supposed to come April 22nd never came..  I'm not stressed or nothing has changed in my life.