Kindle tablets and their charging system may have, or may develop problems, unfortunately.
- If you pulled out the cord by accident, that may have stressed the charging port on the Kindle. It might even be broken internally, and thus often or always refuse to charge.
If it does refuse to charge after such an event then the charging port may be repaired at any number of good electronics repair shops in your region. I suggest that you if you are interested in taking the Kindle to one of those shops, please let me know your local zip code, and I will provide you with addresses and contact information for the best-rated suitable shops in your region that might do this minor repair for you.
- As for the battery heating up, that is different, and might mean that you have a shorted battery, if you are using the proper charger that came with your Kindle originally. The battery might need replacing also in that case, another task which a local shop as mentioned above, might be able to do for you.
Let me know what you think, and I will advise and help you further. Thank you.