Okay, My last period was from sept. 24th to sept 29th. I had protected sex on October 12th. My concern is that I felt wetter than normal after we finished. On the 21st, 22nd and 23rd of October I had some spotting (red, then pink, then brown) and I was supposed to start my period the 26th/27th of this month (October) but I am a little late.

So could I potentually be pregnant? Because I am only 22 and I already have a son (almost 4) and a daughter (almost 3) and I also have a fibroid in my cervix (1.6 cm) so I really do not want to have another child at this time. Is it too early to take a test?

I have heard that implatation bleeding only happens for less than 24 hours. Is this correct or have I been misinformed?