Am i pregnant

My fiancé and I have been trying to conceive for about four months now with no luck, this month i started tracking my cycle a little better and used the ovulation tests. I just noticed this week that my boobs are SUPER sore and today i noticed my areolas are significantly larger than they used to be as well as seeing the veins in my breasts are more prominent. AF expected 1/27, am i possibly pregnant? or is it just them growing? Cause of AF? help!!