hi, my sister did the IVF since 6 days ago, and this is the 6th time i guess she did the IVF and she got a negative results, but this time she is facing a new pain, which is the back pain , and she is hoping that this would be a good symptom for pregnancy, my question is.. this may be a good symptom or a bad symptom after 6 days from the IVF? thank you