Hi Tine51
It is nothing unusual to face another interview especially if nothing has changed and if your condition has got worse, you may be awarded the enhanced component if you are not already on it.
It is not a bad sign, it just makes some claimants feel they are being picked on for being disabled. We have many examples on this forum where claimants have been successful after getting over their initial fears.
Check out our 'Members Only Guide'
www.benefitsandwork.co.uk/help-for-claimants/pip to help you overcome some of your anxieties.
If you have any questions then come back to us.
Gary