Had sex on 5/12/13 he did not ejaculate inside of me and 5/26/13 he did ejaculate inside of me I had spotting on 5/28/13 through 5/30/13 and period came 6/1/13 which was a day late.. It was pretty normal but the spotting has me worried could I be pregnant

Nothing you have said indicates pregnancy.
Nothing you have said indicates that you are definitely not pregnant.
This is true for all women of child bearing age.
Do not rely on withdrawal! Do not rely on time of the cycle!

Spotting is fairly normal,
Since you had period, it is very doubtful you are pregnant.
Withdrawal does not work, he has plenty of sperm in the early fluids.
Since you did not mention being on birth control and did not mention using condoms, are you trying to get pregnant ?

But you will not be 100 percent sure, till next month and you have that period.