I'm sorry to be one of those girls, but...*

I had intercourse on 28th and 29th December. Have just realised I am 6 days late on my period and my boobs are really sore. Could I be pregnant? We were trying for a second child but stopped trying about 2 months ago as felt we were putting to much pressure on it. I have done a test which was negative but I think it's too early.

Thank you to anyone that replies, it means a lot.

*edit... I tested today