Can you do too much cardio?

Also depends on why you're doing it. You need to be sure you align your workouts to you goals. 2, 000 cals a day is major training for a marathon or pretty major sports event. If the main goal is to lose weight, this will work; but you might find altering diet more effective. I note you usually lift, so that will be good when you are fit again. I also note you are looking to use the cardio as a substitute for the weights. Not sure that works.
Still - burning 2, 000 cals is far better than burning none; and you will benefit from the extra fitness

you wont get ripped on cardio. you will lose the fat but you wont get ripped.you have to lift weights at a caloric surplus to get ripped.also 2000 calories a day burned is WAY too much. its almost impossible to burn 1000 calories in 70-90 minutes for most people (the less you weigh the harder it is) just with cardio. maybe bike riding or something like that(I dont mean indoors either) most people can burn that much. if you are having pain while working out then yeah something isnt right. you dont stretch before a workout you do whats called dynamic warms ups(look it up) and you stretch after your workouts.also fueling your body 30-60 minutes before and after a workout is advised as well. Might be why you are having pain and cramping as well.

I would shoot to burn maybe 300-600 calories a day and no more than 4 days a week and 45-60 min a day more than that is not needed for your goals. can you use light hand weights? for like bicep curls,and moves that wont hurt your shoulder? Ive read and research says that too much cardio will put you into a catabolic state and you will burn muscle ,then it can put your body into a type of stress mode and you will lose strength and your metabolism can slow down not to mention it can cause other health issues eventually.you need at least one or 2 days of rest and you can take short walks on those days if you want or maybe try some kind of yoga,you wont burn a lot of calories but it can make you stronger because you use a lot of body weight. I would also invest in a heart rate monitor that has a chest strap for the cardio to see how many calories you are burning.machines often overestimate calorie burn.only wear it while doing cardio though.(not everyday all day like some people do thats not its intended purpose)