Body changes

Hi so me and my wife have been trying for a baby and well there have been some changes in my body recently. I have been emotional, food habits have changed, body temp going up and down, mood changes and tiredness. I came on my period and well it felt like my tampons for falling out or that they were not in far enough. I have read online about ovulation periods too. pregnancy tests before and after periods for negative. Also My wife says that I’m unusually “tight” below. Can anyone give me any advice on this explain about the tampon thing.