I've been ttc for 4 months, my last period was 1st April. I'm so irregular due to coming off birth control. I don't really have a clue when I ovulated this month? We've just had a lot of sex to cover all days. The last few days I've felt knackered, so tired I have no energy, I also feel tearful (maybe from being so tired) and I have sore nipples and occasionally get sharp breast pains? Could this be a sign of conceiving? Please comment.