Tribunal question

I have suffered from anxiety for around 10 years now and it was because of my anxiety i could not speak to my gp or anybody else about it, and this is the reason i did not mention it on my dla claim.

I was just wondering if i mentioned it at the tribunal could end up becoming a negative thing considering on my claim form i stated i had no mental health problems but now i claim to actually have them?

The only reason i want to bring up my anxiety and low self esteem is for the reason i don't regularly use a wheel chair outside, when i use a wheel chair outside it sends me anxiety through the roof and i have panic attacks i feel very paranoid and feel like everybody is looking at me, if i did not have my anxiety i would be so happy to be able to use a wheel chair outdoors as give me much more mobility, i have recently started to try and go out more in a chair more often and my anxiety has slightly improved although some days i just cant face going out at all, im hoping some time in the near future i can over come this.

but like i say at my tribunal i want to inform them that i do occasionally use a wheel chair and the only reason i don't use one full time it because of my anxiety, im just worried that this will go against me considering i did not mention the anxiety when i filled in the forms, there was one time i had a really bad panic attack and i think my mother took me to my doctor so it should be on record of panic attacks at some point i was also offerd councling which i booked an appointment but again due to my axiety i did not go