Ttc and I have need some guidance

Magen • I'm 28 •I have 2 boys 2&7•
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!! ?✨