Still TTC.

So I guess we are actively trying now. The conversation has been brought up the other night. We haven't been using any preventative methods since October of last year ...but I've just recently started tracking my ovulation and fertile days. After our talk my husband and I are on the same page and we are officially actively trying. So my period is due in 6 days. My last week of fertile days was about 2 weeks ago. I'm due for AF in 6 days. We did have sex during the fertile days as well as over this weekend. Today I am spotting. Is this normal from the sex last night? Has AF started 6 days too soon? What is this?