When you’re telling yourself you can’t, how do you overcome this?

You have to try to do it first before you say you can’t, how can you say you can’t without never trying it!? TRY IT FIRST

I just not let myself drown, it's okay to sometimes think we can't but you just need to remember that it's normal to step back and do little by little whenever you feel it, if you're not feeling well today to drink a glass of water just have a sip but don't give up completely