The NO-Xplode will contribute to your sleep problems, given the enormous dose of stimulants BSN puts in it. If all you want is muscle volumization and the vasodilatory effect, I'd drop the NO-Xplode and go with CellMass and Nitrix.
Creatine is not indicated in either sleep disorders or libido problems, so I wouldn't recommend dropping the creatine. Axis appears to be more of an aromatase inhibitor than anything else (I'd guess that anything that suppresses estrogen production would benifit, not hurt your libido).
The biggest culprit here is the stimulants and the NO vasodilatory combination that you are getting from taking both NO-Xplode and Nitrix. These two supps are redundant when taken together, and you might run the risk of overdoing the arginine dose by combining them -hence the racing heartbeat and vascular problems. Incidentally, erectile dysfunction meds like sildenafil are based on the same vasodilatory science, hence the connection to libido issues.
More at Boybuilding.com, and
Here's all the ugly med-speak about arginine. Drop the NO-X and you should be fine.
I'm not a doctor, but I play one on DBB.com, HA HA HA! Seriously -consult with your med proffessional if you start having problems with your best friend. An all-day pump is not worth giving up a good night's sleep, or your tent-pitching skills (if you catch my drift, LOL)