I've read a few blog posts about 2V0-621D experiences, but not 2V0-621.
If they would help, google "vcp6-dcv delta exam" and scroll down a little...
just finished taking the exam but no score. It says I have to wait until the beta exam is over and has to be reviewed?
If I pass this exam, will I be vcp6? or do I need to take a class?
This will answer your question about scoring: Certification Program Beta Exams
Whether you gain the VCP6-DCV or not will depend on what else you've done in terms of official VMware training or other VMware certifications - have a look at the Requirements and Migration Paths tabs on this page: VCP6-DCV Certification
If you took the beta exam for $50 it was the 2V0-621D which should mean you already have an active VCP certification and if you pass the delta beta your cert will be upgraded without any further requirements needed.
Firstly, the 621 exam isn't the same as the VCP550 exam that you are attempting.
Secondly, asking on here for dumps isn't great judgement - using dumps isn't good judgement either, they're created by cheats and used by cheats.