Am I pregnant? I need advice -PLEASE HELP

Am I pregnant? The first day of my last period was september 17th. I missed my birth control pill two days in a row, Sept 30 and Oct 1. I have started taking it regularly again. My husband and I had unprotected sex on Oct3, could I have been ovulating then? I started feeling symptoms on the 7th and took an at home pregnancy test on the 8th, but it came back negative. I have not had a missing period yet so the test could have been taken too soon. However, I'm confused because I have had very sore, full breast and have had a milky vaginal discharge. Also, I have a milky substance coming from my breast. I have a 14th month old son that I breastfed until he was 10 months old and it took awhile for my milk to dry completely up. I haven't had milk for several months. Is it even possible to make milk the first week of pregnancy or COuld this just be from my previous child? Can women even tell that they are pregnant within a week of conception? Is there a chance that I could be stressing out too much and confusing my body into thinking that i'm pregnant? Is it too early to take another test? Am I pregnant or not?? PLEASE HELP!!!