Problem with hunger

I've had a real problem with hunger lately, which has been getting cumulatively worse over the past 2 months.  As i've ratcheted up my workouts i've noticed energy issues (light headed feeling or head-rushes when I stand up) on work out days and even on rest days as well.  I've found that i'm chewing a lot of gum lately to help curb the hunger problem and there is a very real desire to graze.

I'm currently eating around 1400 to 1500 calories a day, over 100g of protein and typically over 150 160g of Carbs.  i work out around 2 to 2 1/2 hours 5 days a week and mix it up in the gym with the majority of the work cardio (jogging, swimming, cardio machines etc).  I'm planning on seeing a sports nutritionist but wanted to gather opinions from you guys as well.  Any insights would be helpful.

Sounds to me like you are not eating enough. You will burn 1500-2000 cals in 2 hours depending on your workouts and you are having a huge caloric deficit and are probably really low on Glycogen stores. I don't know how big you are, but I am 6'2" weigh around 200 pounds and eat 3500-4500 calories a day on average... Sometimes more, sometimes less....Get with your nut, talk about your goals and let them help you. Good luck buddy.... 

thanks for the info.  I'm 6'0" and weigh around 250.  I have a decent sized frame and think it is realistic to get to around 200 eventually.  I started off @ 431 6 1/2 months ago.

The three times that I have trained for a marathon, I gained 10 pounds each time.  I lost 5 after each for a net gain of 15 lbs.  Once the big mile runs came up, my appetite went through the roof.