OK hun I still think that it is Braxton hicks.
If your pains become regular and the gap between the pains become regular for more than a couple of hours then you should contact the hospital. For example if the pain lasts for 30 seconds and comes every 15 minutes then contact the hospital.
The ach in your girly bits is caused by an increase in the blood supply to this area. You may also notice that your girly bits are swollen this is normal and nothing to worry about. If it becomes too uncomfortable an ice pack may help.
The ach in your lower back is also normal and caused by the change in your centre of gravity. Hot packs and massage may help this. You could also try using a TENS machine.