I had a femoral stress reaction high up, near the neck. I think a femoral neck is a worse injury than the one I had, but they are similar. Yours also seems a lot more painful than mine. I did a lot of research so that I could be as informed as possible. I was able to swim one week after diagnosis, and started biking 2 weeks later. I was doing AlterG twice a week at 4 weeks and was back to land running at 9 weeks, after a repeat MRI. That being said, I was lucky, I caught my reaction before it got bad and had no pain at all while walking after a few days off and being adjusted by PT. If yours is a fracture, it will be a slower and more careful process.
My recommendation to you:
Go to a good sports orthopedist/doctor, who has dealt with this before. If they have not dealt with runners and this injury, they might be way too conservative or not conservative enough (depending on how bad yours is) .
Go to a really good PT that deals with runners. My injury was due to an imbalance in my hips. In fact, the sharp pain in my groin went away ( still had a lot of tightness) after my PT worked on my alignment. I then still got the MRI a day later, which confirmed a stress reaction
I was able to cross train a lot, but that is because I had no pain or discomfort while cross training. When I started land running, I came back slowly, gradually running more and cross training less. I was back racing three months after starting to land run. I haven’t had a problem since. I always make sure I check my alignment and I continue all strength training that the PT gave me.
Surprisingly, a lot of female runners have had this injury. In fact, many of the pros have had it at one time in their career. Coleen Quigley, Emily Infeld, Dez Linden, Jenny Simpson, Shannon Rowburry, and many more. You will come back from this, it might just take time, depending on how severe.
Be careful till you get the MRI results, since yours is potentially in a bad area. Recovery can be anywhere from 8 weeks to 6 months, depending on how severe of a break. Hopefully yours will turn out to be a reaction, which is usually 6-10 weeks .