My female swordtail had been pregnant for a week, and until today I actually see little fry coming out!

I had already seperated the female into a net breeder and for the whole day, my fish had been swimming funny (as in tail pointing up most of the time). Is this normal?

How long is this breeding process going to last?

And I saw 5 fry today...but they all died...is there something I did wrong? (I did seperated the fry from the mother and others)

What should I do now and how long should I leave the female sword in the net breeder???

Thanks SO MUCH!

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7 neons, 6 platties, 2 swords,