Well with the symptoms you describe and the fact that you have been trying are good sings that you could be pregnant, my concern is the smoking thing, why would you TTC while still smoking? It is unhealthy for you and the potential baby? If you are pregnant maybe it is your body telling you to quit…I did and will never regret it, I am so much healthier and my kids don’t have as much of a chance of developing asthma….Take a HPT once you are late or call this number 1-800-395-HELP, they can give you the number and location to the closest pregnancy resource center to you where you can get a FREE test…. I hope this helps a bit, how old are your kids? Married? How many more are you wanting? I am 26 and I jsut had my last…LOL…Love Meg