How soon can you feel symptoms after conception? my nipples got sore 4 days after unprotected sex with my partner

Pregnancy test: Four days after unprotected sex seems early. I would consider taking a home pregnancy test.

You can't: There is no way to determine for sure if you are pregnant between ovulation and the start of the next period, except with a sensitive pregnancy test. Symptoms so early tell you absolutely nothign, i'm sorry. If i misunderstood your question, please feel free to ask again.