Two weeks ago I had unprotected sex, he accidentally came in me, but not too deep in, two weeks after I began to cramp bad like period cramp, but my period should come in the end of the month. Today I squeezed both of my breast and a drop of milk came out, could I be pregnant?

You would not be producing milk this early. What the little drop was, I don't know, but it isn't any kind of proof of anything.
The rest - how far in he was, where in your cycle you were, what symptoms you have, are not very meaningful in regards to odds of pregnancy or getting your period or ovulating or stress or wishful thinking - or something totally unrelated.
Yes, you can get pregnant if you have sex!

Thank you,, have anyone had the same happen to them and was pregnant?

What - the alleged drop of milk?
Because the rest is just too common and has too many variables.
(I don't know of anyone who has ever had a drop of milk if 2 weeks pregnant.)

Don't know what it is and why, that's why I'm asking.