Morning after pill

On 19th June I had sex with my boyfriend and the condom split (he pulled out straight away and didnt ejaculate) I took the morning after pill on Tuesday and got my period on Wednesday which ended on Sunday. On 28th June I had a light pink streak of blood after wiping and haven't had it again. On 29th June I woke up with cramps.

What could this mean? Is it side effects of the morning after pill or early pregnancy? I really don't want to be pregnant.