Caught my husband cheating

I shaking right now from just the amount of lies that have been uncovered. I always warned him I always find out. Everything always come to light. I found two different Instagram accounts, dating websites for hookups, a different Reddit account. I am just so shocked honestly I don’t know what to think. I don’t know how to process this or even begin how to approach him. I took pictures of everything. I also saw he had changed his passwords as well. I don’t know what to do. We have a child together. I feel like a failure. Am I not enough? Am I not what he wants? Does he want someone else? Has he slept with someone else? There’s so many questions that I want answers to but I don’t know if I will ever get them. The worse part about it, is that this was going on while I was pregnant. He knew about my insecurities while pregnant and because of my previous relationship experience. I feel betrayed, lied, manipulated, gaslighted. Why hide these? Why lie to me?