Tuning question

I have been shooting pretty regularly now for the past 6 weeks.  With field points I have been comfortably shooting tight groups out to 40.  I had not shot any broadheads prior to yesterday.  I have not shot muzzy's out of this bow but, I decided thats what I want to use this year (I used them with my old bow).  I shot a few broadheads at 25yards or so and I was appalled at how horrible the arrow flight looked.  After about 6 shots with similar results I realized something is off with my bow. 
 
Is there a way to tune my bow myself?  Or should I just take it somewhere and have them mess with it?  I am pretty sure that this has something to do with the new string I had put on this Spring.  I never re-paper tuned it afterwards.  I am just worried now that I am going to  have a hard time getting in at a shop now.  However, i have never messed with any of this stuff.  I guess the things that could be wrong are the nocking point, rest height, and limb adjustments.  Any thoughts or input on the subject will be greatly appreciated.
 
Heres my setup:
Hoyt Razortec
70#, 29.5" draw, Gold tip expedition arrows, 100gr 3blade Muzzy's
Muzzy zero-effect rest
I also use a string loop
 

Chris,
 
I'd take your bow to a local shop. Even though most are pretty busy right now, you'll probably only have to wait a day or 2 for it.
 
I killed my first few archery season deer with muzzy's. They are a solid head, but with each pack I bought, at least 2 out of the 6 were flyers, and would not group, even with a paper tuned bow. I could screw the flyers on an arrow, spin them on my finger, and be able to tell they weren't in line with the shaft. I figured if I am paying for 6 heads, I should be able to shoot all 6 with no problems. From that point on, I didn't buy muzzy's again. That being said, they killed every deer I shot with them, no problem.
 
Do you have your bow with you in State College? I can send you in the right direction of a good shop. Also, let me know if you want to shoot sometime.

Thanks for the replies guys.  I just dont feel comfortable enough messing with it myself, not to mention I don't really have immediate access to shoot it.  I am going to take my chances and bring it to a shop here in State College.  I want to get it paper tuned and try the muzzy's again.  If they give me the same grief I am going to try another head.