Ttc and I have need some guidance

Magen • I'm 26• I have 2 boys 1&6• Stay at home mother
So been ttc since oct 18 AF 18-20 since two days ago my boobs have been hurting off the radar! Can't get comfortable at all in bed either! Could this be a sign of pregnancy? No other signs rly except slightly tired, when should I take a test? (AF is supposed to come 20 something this month) hoping for feedback!! Thx!! ?✨