From time to time, meditation can cause you to feel roughness or uneasiness for a short while. If you have noticed that feelings of stress or anxiety have increased since you started meditating, this is an indication that you are practicing correctly and stresses in your body are being released.
If your feelings are becoming overwhelming and you are meditating twice a day, drop back to one session a day. It's important to meditate at least once a day through this period, as meditation allows creates the perfect conditions for stress to be released. The feelings of anxiousness and uneasiness will subside after some time and you will feel a great sense of relief. The process of releasing stress sometimes involves us feeling 'flavours' of the stresses as they leave the system. When this happens, it's important to remember you are having a stress release, not a stress reaction. Allow the feelings to be there, and allow them come to flow through you with no resistance.