It's just braxton hicks and pressure of baby getting bigger. You will probably feel like that for a few weeks. You only need to start timing if you start getting pain. Your nearly there though good luck!
I'm 38+4 been really crampy with on and off pressure for about two weeks...still no baby :/...I've been stuck at 1cm for two weeks :(......but my cervix is thinning....my midwife said its just our bodies getting prepared..so hopefully soon lol
im a ftm too and im at 37+6 today and havue been feeling the same way for a few weeks. its possible but at this point everything is gonna feel crampy for a while. but things could change to full labor in just a few min. good luck and hopefully we get to meet our little ones soon.