You took two types of protection during sex. First was ejaculation outside and second one was morning after pill.
So you are less likely to be pregnant.
Breast tenderness could be due to foreplay with pill use continuing the tenderness further.
Morning after pills do cause breast tenderness and is a very common side effect.
So you need not worry.
However pre ejaculate secretions contain few sperms. So if you miss you next period, do test for pregnancy