You probably have a lot of apps still running in the background which need to be closed completely. From the home screen do the four finger swipe up or double press the home button to reveal your multi task bar. These are all the apps that you have opened at one time. Long press an app until it jiggles and a red minus sign will appear above it. Press the minus signs, this will close the apps, not delete them, now press the home button to return to your screen. It's also a good idea to close all these apps regularly as it helps the iPad run smoothly. Let us know if this fixes your problem.
The IPad Forum is a community of members from all walks of life and from all over the world coming together to share our experiences and to help each other learn about this wonderful piece of technology the Ipad. There is a wealth of information already here in the many threads we have so doing some searches will answer most of the questions you have. If then you cannot find the answer you are seeking then by all means post your question. There are many friendly and informed members here only too willing to help you.