Kidney stones!!

ttc for rainbow baby • My husband and I have been together 7 years. Married since Aug 2014. We started ttc in July 15 and got pregnant first month and it ended in an ectopic. We are now waiting for our rainbow baby .
I have been having sever cramps in my lower abdomen lately and the doctor found blood in my urine. I have to see a nurologist now and hope that it's nothing worse. Any one else ever had kidney stones?