Are we in a bubble due to burst soon?

P/E ratios are getting close to where things were prior to several huge corrections. Anyone who has been investing for a long time should probably be fine for a major correction and still be up or even. However I just entered the market with a large sum and am terrified I am buying at the top, since I can not DCA.

Would it be better to just go heavy in treasury yields? So much fud going on, and not sure if it's for clicks and views. But it's scaring me to death. Several times I've made the mistake of buying into something too high and it took many years to get back to even.

So far I am all in on SCHD SCHG and SCHB. Any advice appreciated.