Don't worry about it. It happens to everybody.
Let the cameras rot for a while. Sell some (a bunch of 'em)...or all but one! Force yourself to sell that excess gear - it is weighing you down...paralyzing you. Get rid of it. It will be good for you.
Most importantly though...don't worry about it. Just do something else that interests you.
I think we all go through dry spells. Sometimes, they are long. I lost interest for 13 years...and came back.
That's one thing I've discovered. When I've had a lot of bodies, I'd rarely do much shooting. So, I began selling stuff off. Once I got down to, say, three or four bodies, I'd begin shooting again. Then, I'd start adding more gear again, and my production of photographs would go down. I intend to keep my four pro Nikon bodies, since I'm getting tired of repeatedly buying the same model body over and over again, and the F-series bodies aren't as cheap as a 'mat or an FM/FE series body. So, my current stable of F, F2A, F3P, and F4 bodies will remain. One of the four bodies was one that I've owned twice. Bought it originally in 2007, then traded it with some stuff in on my current F2A. Got it back at the end of last year, when it reappeared at Kenmore Camera.
The current non-pro bodies will probably stay as well. The FT2 just had a full overhaul done to it, including a new mirror box, to fix the jumpy meter needle issue. Cosmetically, that body would need a new top cover, before it'd be nice enough to *maybe* break even on, so it's with me for the long haul. The chrome FTn is very nice cosmetically, but has the same meter issue. I probably won't have a new mirror box installed, but will have the meter overhauled, and a minor CLA done while they're in there, to get it 100% into spec. The FE2 does need some minor work done to it. Had to extract the rewind crank shaft, which involved taking apart the ASA/ISO dial assembly to gain access to the tang that activates the latch. At the moment, the meter is 1 stop off. To set it at ISO 640, I have to set it to 1250. Or, if I want ISO 100, it has to be @ 200. It could also use a new top cover, since the current one is dented just enough that the multiple exposure lever has to be manually returned to its normal position after being used. Seems to be fairly common, since my previous FM2n had that problem, as did a couple other black FM2n's that I owned, and my other FE2, as well. The chrome bodies didn't seem to be affected as much.
Anyway, to get back to on topic, I nowadays carry one or two bodies and a prime lens or two. I do switch them out from time to time, but, I don't usually load up the bag with as much gear as I can load up, then lug it with me. Took a road trip two weeks ago. Went to Portland, OR for the weekend. Loaded up the FTn, the F, F2A, FM2n, and the F4, plus a bunch of lenses. Shot with two bodies. The F and the F2A. Lens-wise, I used the 24mm sparingly, the 50f2, and the 85f1.8. I think I might've shot one shot with the FM2n, but the F4 didn't come out of the bag once. Similar situation over the New Year's Eve/Day weekend in 2007-08. Went down to Salem, Oregon, to visit with my father, while he helped with the FEMA relief. Loaded up an FM2n, my F2A, my F, and an F5 that I owned @ the time. On New Year's Day, we decided to go visit the state capitol. Took the FM2n (without MD-12) and the 50f1.4 with me. Left everything else in the hotel room. Took quite a few shots, and had fun. Of course, over @ Nikonians, I got lambasted by one of the former members, because he believed that I should've lugged around the Domke F-2 with every single lens and body loaded into it. Think he was also a bit perturbed that I didn't take an F3HP with me on that trip.
-J