I started getting mine at about 16 weeks..... i am now 21 weeks. sometimes only a handful a day, other times up to 1 every 5 to 10 minutes! they seem to be possibly connected to stress and being on my feet,I can also get one just my lightly pushing on my uterus....I seem to get more at the end of my work week. but water and rest don't really seem to help much for me either. wondering if anyone else has experienced this...seems i may have an irritable overactive uterus or something? My biggest fear is preterm labor....hoping there are other mommies out there who have had this and delivered healthy full term babies.