I had a very tough go at interviews as well. I will say that the only positive part of being unemployed for 3 months at that particular time was the number of interviews I had. That is really the only thing that helped. Also a little bit of interview prep. Already have bullet points when talking about yourself, why your interested in the job, what skills you have etc. If you can ask a friend to role play with you and do a mock interview that may could help as well. Good luck!