So Im 32 weeks excatly and since my 2nd baby was a premie they have me doing this shot each week since i was 18 weeks called the mckenna shot and have to get it up til 36 and its suppose to stop preterm labor, well im having all these symptoms, ill cramp for ab 25 - 45 seconds 2 or 3 times and hr but have constant back pain that starts in my lower back and shoots all the way to my neck, and my legs feel weak and shakey and i continously feel like im gonna pass out and i drink plenty of water and gatorade , i have an app Monday morning should i call my on call doc now or wait til monday?