She shouldn't be having more fry in a few days. That is too long to wait. Like I have been saying, I do not think she was is going to have more. If anymore were still inher, they would have died by now and benn re-absorbed by her body. She may not have been the one who had the other fry (unless you saw her do it). Sometimes, guppies drop fry when you didn't even know they were gravid, so it may not have been her. This is especially true of first drops since they are usually small.
If she is waiting to have fry, then hopefully it all goes well, but watch her because she may not be doing well. If she is the one who had the fry, and now she is not moving much, that is not a good sign.
Move your other females out of her tank in case she in unhealthy. Also, it will be better for her to be alone if she is going to drop fry so they will stand a better chance of living.