Yea I you have to file it right away
Is There A Deadline For Filing For Unemployment?
You want to file as soon as you can, so your claim falls in the quarters you had income. If you waited for 6 months to file, you may not be eligible cause you only had 1 quarter worth of income to claim against.
You need to file as soon as possible, then you will have one week waiting period and some of these extensions have deadlines on them, but you have to exhaust all your regular funds before you start on them.