Can you list those cards? Wait for more expert to chime in, these lenders may behave differently. Don't call those cards until you have more info from here, sometimes calling those may end up with AA instead.
650-ish surely is worse than you had, but it is not a horrible score neither, as long as there is a plan here, don't panic.
AMEX will occasionally offer to restore one's limit if one agrees to pay X amount by a certain date.