Any suggestions

This might sound absolutely disgusting but I was depressed for a while and I didn’t brush me teeth every single day I mean I would sometimes but not everyday because I would be in my room all day. I’m better now and am going to start dating again and having fun but I’m so nervous about my teeth.!! Is there any way I could get them whitened n smelling better I’m flossing n brushing again. Also I’m not wealthy so I can’t go buy expensive stuff for them🙁