Sumatriptan and Hemiplegic Migraines

So, I got prescribed a sumatriptan injectable to use when the nurtec alone doesn't work. I tried it for the first time today, and it has made migraine worse, not better.

Some googling seems to suggest that sumatriptan is not effective for hemiplegic migraines, which this one is definitely a hemiplegic ones. Can anyone else confirm? Or has anyone else had issues with sumatriptan?