Pregnant or not

I've been TTC the past two months and use period trackers and all. According to one app I have I should have started my period 3 days ago which I haven't but it would still be too early to take a test. I've been really nauseas, sore breast, tender nipples, hot flashes, APPETITE LIKE NO OTHER, but I've had no implantation bleeding if I am pregnant. Have any of you experienced any of this and turned out to be pregnant, If i am I would be 4 weeks today? Tia