I felt like you from around the 34th week plus heaps of braxton hicks but as of last week (36), all those symptoms disappeared so not sure what that's about.
Look out for contractions and time them :) if they get longer and more frequent, this could be it for you.
Honestly, there's no telling, as stated above, sometimes these symptoms come and go. There's just no predicting, really, till you feel consistent contractions, lasting at least one minute, 5 minutes apart, for at least 1 hour.