I have been trying to conceive for quite some time but, didn't get pregnant

I have been trying to conceive for quite some time but, didn't get pregnant. I started using glow only a couple months ago because of our difficulties on trying to conceive. My breast usually get tender right before my period and I though great, my period is coming. After sore and tender breast for a couple of weeks along with extreme tiredness I knew that I had to be pregnant. I had bought previous tests so I was able to take one and it showed a faint line. I sent the hubby to the store to get the digital test and the digital test confirmed it. All in all I took 3 test and all confirmed positive. I made an appointment with my doctor and the 4th test was confirmed at the doctors. The doctor told us our baby is due December 18th, woohoo! Im 4 weeks pregnant. My husband and I couldn't be happier we can't wait to see are bundle of joy. I feel so blessed and the best part is I have a 13 year old who has been begging for a little sister or brother. I can't wait to tell him!!!!