Grrr.....Over extended

[Hellenic_Hoplite]

I'm playing as the Romani and it's 206 BC, I've been in a war with the carthaganians for quite some time now and for the most part kicking their butts. my empire ranges from the Turkish cost to parts of Ibera. (already conquered all of greece, the macedonians have been driven to thrace. I also have most of gaul although central gaul belongs to the arverni) Now this is where my problems start, I've been destroying stack after stack of Carthaganian armies in spain, all I seem to have there are those crappy iberian light spearmen and a few iberian light infantry. at the same time my former allies the arverni and the macedonians decided to betray me and are sending huge stacks against my Gaulic and northern Greek cities, not only that but for no reason the giant ptolomic empire decided they wanted war for no reason. (they destroyed all of the seleucid empire and their empire ranges from egypt to india ) I think I'm going to have to start a new campaign.

any advice?

edit* Forgot to mention I also have north africa although thats not threatened at the moment