Always sick since starting this healthy lifestyle :(

I'm sorry to hear that!

To help us make suggestions, can you describe what a "healthy lifestyle" means to you? What are you doing/eating, and how is it different from what you used to do?

And what sort of sickness? Colds? Stomach issues?

Please define "sick"? You mean like the flu sick or diarrhea sick?? If you adding alot of fruits/vegetables and high fiber grains etc...and not used to it, may want to slow down by adding in that stuff to your diet a little at a time. Your body just may need time to adjust. If it's just the flu or cold or something...probably a coincidence and should see a doctor. Drink alot of fluids and feel better!

How many calories per day are you averaging? Getting enough protein and fats to go with those fruits and veggies? You might consider upping calories to maintenance and cutting back on the cardio and lifting while you recover. Anyone can get sick at any time, and late winter/early spring always seems the worst at my house!

Although there are foods considered by some to be unhealthy, as long as you don't have specific health issues eating "healthy" really doesn't mean anything. You can eat tons of fruit and end up with diabetes from the sugar content. You can eat very low carb high fat diets and end up over a long period of time with an unhealthy cardiovascular system. Eating healthy is just too wide of a term unless you can pinpoint what eating "healthy" means to you. If you're sick all the time, it may just be a result of being around other sick people too much, what do you do for a living? School? Working with the public? The flu shots this year were near worthless (as they are most of the time). Heck I had the flu at least three times in one form or another since last November and I take a ton of vitamins each day. There are many ways you can run yourself down or deplete your immune system; Over exercising with no rest days, eating too few calories for a long period of time, or even combinations of both. I guess my point for the OP is that if you're getting enough calories, and you aren't starving yourself of specific vitamins (MFP reports can give you an estimate of the major ones), then it's probably just bad luck and has nothing to do with the diet or exercise. Again, that's unless you're overdoing it.

It sounds like you might have mono. Maybe get checked for that.

At our workplace a flu strain's been circulating along with two different cold viruses. Knocked me down for a month of exactly what you're describing - head cold, recover some, all achy and sore throat, recover some, back to head cold.

I think this is just coincidence...it has nothing to do with your diet. If you're sick though, you might want to back down on the exercise to allow yourself to get better...make sure you're eating enough calories.

A probiotic may help too! How are you feeling? Any diagnosis?