vegetarian muscle building?

I started being mainly vegetarian about two yrs ago. I still love protein, dont get me wrong. I started just getting to a point where nothing sounds good anymore at all however. At all. Before the vegetarian stage, I was on an extremely limited carb diet for muscle building/toning. That worked fantastically with great energy as a result. Now though, after going through this change from a ton of protein every single day to just fowl and fish protein, but very limited amounts and some days only relying on protein bars, I have no energy. I bike to work every day which round trip is 8 miles and recovery is virtually impossible, I know I have to fix this problem, but I have to feel better to even get started. Hoe do I do this? Please no rude answers and no solicitation. I will junk your link if you try and sell me any product. That being said I am open to suggestions. Thank you in advance.