hot or cold??? please help

If I've done a really hard workout then a short cold bath stops me getting as stiff the next day but I have to follow it with a hot shower so I don't freeze lol. After one really hard long run when I'd been out for 2hrs I got in and just got straight in a cold bath, clothes and all. The next day I was expecting to be really stiff but was just a little sore, since then I've been sold!

ETA: if you're already achey though a hot bath and a massage will help

Stretching, warm shower, Aleve

it depends on the aches and pains, and what exactly you're doing all over again.

Muscle is built during rest - lifting tears and damages the muscles, you rebuild them during rest. If you're returning to the gym to re-damage the same muscle groups before they heal (stop hurting), you're cruising for a more serious injury.

If it's aches and pains from injury (like one leg hurts way more than the other, or it's a sharp pain), cold. And figure out what you've injured, and let it heal.

If it's aches and pains from just lifting more than you're used to, cold helps in the first 48 hours or so, after that it doesn't do much (in my opinion it stops being worth the discomfort). NSAIDs are awesome and can help outside that window.

Please make sure you're getting in your rest days. They're not lazy or slacking, it's rebuilding - it's the entire point of going to the gym in the first place. If you don't (re)build muscle, all the pain is pointless!

Ice baths for the win!

Oh, another word of warning - if you've seriously got damage going on, and you've done an incredibly hard workout, hot baths will actually make life way worse. But I'm talking if you've run 15 miles, don't hop in a hot shower. The reason is the heat just makes your body's natural inflammation response that much easier by increasing circulation. So ice things early, and avoid heat if you've really, really overdone it.

well today i burned 1874 calories doing 199 minutes of cardio exercises so my body is on fire i have 2 rest days a week and i use the trainer at the gym for max results

This is to much. How long have you been doing this? My bet is you don't last a month. You didn't put the weight on in a month.
your not going to take it off and keep it off in a month. Shows like biggest loser do not model safe and healthy ways to lose weight. I'm not saying this to be mean. I'm encouraging you to do some research. If your paying a trainer that is encouraging you to do this I would question his quaifications and suggest getting a new trainer.

Where are you getting your calorie burn estimation from?

If you use bath salts, you will go on a spree of eating people which will negate your calories burned with the exercise

exactly. I am pretty sure bath salts lead to nudity and cannibalism.

If it's aches and pains from injury (like one leg hurts way more than the other, or it's a sharp pain), cold. And figure out what you've injured, and let it heal.

If it's aches and pains from just lifting more than you're used to, cold helps in the first 48 hours or so, after that it doesn't do much (in my opinion it stops being worth the discomfort). NSAIDs are awesome and can help outside that window.

^^^^ This! For running/sports injuries I use the RICE regimen (Rest, Ice, Compression, Elevation) plus NSAIDs as needed and topical Arnica. It's helpful to remember cold vasoCONSTRICTS and hot vasoDILATES. It's important to know if pain/soreness is from lactic acid 'burn' or real injury. Take care of yourself!