Does it mean a miscarriage?

Polina • Got married in Oct, 14. Jointed Glow in April, 14. We are having baby boy due Oct 1st.
Hi ladies, I woke up this morning and realized my boobs feel different. They were not as tight and heavy as they were the previous day. Even my husband said they feel different. They are still sore but a lot softer. Does it mean I am heading to a miscarriage? According to glow I am 5 w and 3 day. Any response will be appreciated. Thank you.