Often if you apply for additional financial aid during the year then it is split accordingly based on the remaining fianancial aid disbursement times.
For instance, at PCOM we get our loans in 3 parts, at the beginning of each trimester.
If I apply for $6,000 additional and we are in the 1st trimester, I get $2,000 immediately and the other $4,000 is split between the other 2 disbursement dates.
If I apply for $6,000 in the 2nd trimester I get $3,000 immediately and the other $3,000 comes at the last disbursement.
Needless to say you should get SOME money immediately, if not all. I suppose it would depend on the policy of your schools FA department. Where are you going next year?