I have stopped for almost two months

I have not picked in almost two months my nails are nice and long. Mom told me i should get a manicure. Lately i have had the urge to pick my nails and hands again. It may be from all the assignments and projects and tests that are due in the next couple weeks. Some of them are HUGE projects. It may be also partly that i put nail polish on my nails yesterday and i always end up picking it off and i took some of it off already today. What are things i can do to help the urge? Thanks :)