IF you are far enough into pregnancy to have a single pregnancy symptom (sore back, sore boobs, nausea, etc). You are far enough along for a PREGNANCY TEST.
Chances are what you are experiencing is normal for you in this time of your cycle. But, because you want to be pregnant so badly, you are now creating it as a pregnancy symptom.
So I go back to what I said, if they truly are indeed pregnancy symptoms, a pregnancy test would be positive. If not, they are not pregnancy symptoms.