So, to make a really long story short..?

I have been to the ER twice in the past 4 days because of serious back pain. I am just over 18 weeks pregnant right now. Found out I have fluid on my kidney, and 2 small kidney stones. They sent me home and told me to drink plenty of fluids and theyll p eventually. I feel like they did not thoroughly check me out, Im once again (as usual for the past week) in alot of pain, and they just keep sending me home ...I have 2 aunts who had kidney stones while pregnant and they both had preterm labor due to the stones. I am scared to death this will happen to me, it is WAY to early to have this baby. Dr's dont see so concerned, they say theyll p with time. Ive been calling their office like crazy to get ahold of my OBGYN. He does not know yet that i have stones, he has been out of town for the holidays. Now theres no answer at his office, im uming because its new years, and im worried. What if I try to p the stones and I go into labor? Stones, and preterm labor are heavy in my family.