Hi
It's been a month since you sent this and sorry I have been unable to post til now. If your cat is still showing this strange behaviour I certainly think it needs to be checked out. Take her for a health check and a vet will able to give her an examination. They will advise what kind of testing needs to be done if she is still having these violent episodes. Sounds like you also need to be careful that she doesn't hurt you during them.
Cathy Wickenden BVet Med MRCVS
Barton Lodge Veterinary Centre
1 Midland Road, Hemel Hempstead, Hertfordshire, HP2 5BH
Tel: 01442 216048 24 hours
[
www.bartonlodgevets.co.uk]