Touchpad is semi-frozen

I haven't used my Dell 15 in a month. I charged it, and while charging,the touchpad didn't exactly work. I move the cursor over a tab to close it and nothing happened. Tried tapping to check boxes or click submit but nothing happened. I'd have to push the bottom right corner of the touchpad to do anything. I remember changing settings so my cursor was darker but that's it. Now my touchpad is snafu. Usually I use a pen mouse but the battery died. I need my touchpad to work! Is there a setting I may have reset wrong to kill my touchpad? Oh, the up/down/eft/right cursor keys don't work either so I can't scroll through a page. I have to use the lower right corner of the touchpad and click.