Trying to conceive

So my expected period is on Tuesday. For some odd reason, I haven’t had any PMS symptoms like I usually. The only one I’ve had were my acne and gas but it only happens my 1st week after ovulation. My 2nd week I usually get REAAAALLLLY sore boobs to the point to if they’re exposed to air, they sting. But this month.. no sore boobs, no moodiness OR irritability like I usually have. I’m usually VERRRRY emotional 😭 and annoyed easily. But again, this month... nothing 🤷🏾‍♀️. My boobs aren’t sore. I can feel a little pain & today I started having back pains. What could this possibly mean? 🤔