Should I wait to do my MSN?

I'm currently in an accelerated BSN program and I'll be done in July. This particular program gives students the option of going on to get their MSN and NP license (which takes 2-3 years) right after the BSN portion is completed and the student passes the "big exam". What I'm trying to figure out is if I should go on the MSN portion right after I finish the BSN portion. A part of me wants to because I don't want to be going to school forever and I'm afraid that if I take a break, I'll never go back. The other part of me is afraid I'll have a hard time finding a job as an NP with only 2 years experience as an RN. I intend on working full-time while I'm doing the Masters but I'm having a hard time deciding when I should do it! I know it's a bit early, but I figured it's better to plan ahead than wait until the last minute. Any input would be appreciated!