Suddenly not starting, could this be a battery issue?

I put the key in the ignition and turn the key, it will star to turn over and then just click, click, click, click, click. Up until this point, I have had no problem starting it.
I did accidently leave the dashcam on the day before. Could this be a battery issue?
Can't afford to take it into a shop and the guys I usually have work on it for me are all busy. I'm also on a fixed tight income. I just got my brake line fixed, now this. Ugh. I need to figure this out so I can still see my son on Sunday.
Thank you so much for any help you can give me!