So this is my 3rd pregancy (1 live birth 1 misscarrige) im now 29 weeks 4 days. I just got another rhrogram shot but this time i feel exhausted! I looked up the side effects and weekness and bein tired is a side effect. But i never had side effects before....and i have this shot many times before. Why is this just now effecting me?? Has this happened to you? Is there somthing i can do to fix it? It stays in your system for 12 weeks, am i just going to be tired like this till my shot wears off??