It's normal to experience breast tenderness and/or swelling as a PMS symptom as well as a pregnancy symptom, so that one can be tricky. Sex drive is based on hormones, so that one can be tricky as well if you're using it to determine whether or not you're pregnant. Morning sickness generally kicks in for most women around 6 weeks. It's possible that depending on your hormone levels it could develop earlier.But, you won't experience any pregnancy symptoms until a fertilized egg has implanted in your uterine wall and your body has started producing hcg. Your body will not produce hcg before the egg has implanted. So if it hasn't been long enough for a fertilized egg to have implanted (about 5-10 days after conception), you aren't experiencing pregnancy symptoms. It's more likely that you're feeling what you expect to feel because you want to be pregnant. And that's totally normal, so don't feel bad.After my daughter was born I had a Mirena put in, but I didn't trust it because I had gotten pregnant while on the pill. After a couple of weeks I was positive I was pregnant. I had nausea, tiredness, and other symptoms. I saw my doctor and I wasn't pregnant. After hearing that I definitely wasn't pregnant the symptoms went away. Also, if you find that you aren't pregnant this time around you should think about trying the home ovulation tests. The body releases a hormone that stimulates the ovaries to release an egg, and that hormone is what the tests look for. If you get a positive test that means you'll ovulate in about 2 days. I used them for birth control because I had a hard time with pills after my son was born. When we were ready for me to get pregnant I knew exactly when the time was right and it only took one "try" for it to work.