Come and go irregular mild pains in lower and upper back and in my hips. A pain like pressure feeling in my butt and…

Come and go irregular mild pains in lower and upper back and in my hips. A pain like pressure feeling in my butt and vagina area that come and go, irregular. Stomach cramps all over, mainly on top, that come and go more often then the other pains that come and go. Id say their pretty regular. But not on a specific type of pattern. I was dilated to 3 1/2 cm and 90% effaced last week. Don't want to make an unnecessary trip to the hospital with two toddlers, but definitely don't want to have him at home or in the car. I don't know what to do and want some advise before I make any calls.. ????? PS, when I get the tightening pains in my lower stomach that cause my hips and back to hurt as well, (witch have been more regular today then they have been the past few days) I have pressure in my butt area... ??? Is this labor or what?? ( My last 2 pregnancies were both completely different, not one pregnancy has been the same in any way lol!)