Originally Posted by Racer Ex

In a nutshell from my perspective:

1) You don't have an established base
2) Racing is not training
3) Way too much top end and zero middle.
4) 5 hours is barely enough if you're doing it right. You're not doing it right.

You don't need a PM. An HRM at this point is ground zero. Race once or twice a week. Otherwise ride high zone 2 and low zone 3 on every training ride if you're not resting. Rest when you're tired. Put together a log. Tell your current coach "thanks, but I think I want to go in a new direction".

Go buy a cheap HRM and Joel Friel's Training Bible. Read it, cover to cover. Then read it again. Follow the above until you've done that, then come back and pepper us with questions.