Possible symptom or too soon to tell???

Rebecca • 👶🏼#2 due August 30th 💖
Hi ladies I'm 7 DPO and I've had tender breasts and sensitive nipples. Could this possibly be a symptom or is it still too early to tell. Pretty sure it can't be AF as she's not due for a while yet and I only get these within a few day of her turning up. Keen to hear any thoughts you might have. 
​Thank you ☺️