What is happening

Can possibly being pregnant be the reason my boobs don’t hurt. For the past year a week before my period my boobs are so sore , this time around , my boobs aren’t at all sore , I start my period in 3 days and there is not the slightest of soreness . I did have sex 2 days before ovulation and the day of ovulation with some brown/pink discharge at around 6-8 dpo