If I had unprotected sex 3 days after my period and he spermed in me 3 times what are the chances of me getting pregnant? Would it be easier since I just had a baby 3 months ago?

Yes it will be easier to get pregnant , buy a test

You may or may not be pregnant, there is no way at all to test, until you miss a period, that is the first sign of pregnancy, so have you missed your period yet ? You will need to miss the period and then wait two weeks to properly test.

But yes of course it is a chance of pregnancy