Hi, My last period date was on 25th march and I am expecting my next period on 24th April. On 14th to 16th April. I had unprotected sex. Today (24th April) something did came out but the colour I saw was yellow, I couldn't differentiate much as my pant colour was dark bluish-grey. Can that possibly be implantation bleeding? And also I didn't took a urine pregnancy test.