Curious, you have sex with her daily but she never wears her new underwear?

I don't think it's paranoia because you found opioids in her bag you knew nothing about.. so she was caught lying to you about something. She then handled it with anger and shifted the problem to be all about you.. and then pretended nothing happened. It definitely warranted a conversation the next day.. but none was taken?

In my experience, when my partner is confronted with something he's hiding, he initially reacts with anger. Then he needs some level of space away from me. It's what liars do. It's really hard for them to be in close proximity with someone they just lied to.

Instead of guessing, I'd take this to couple's counseling. Things need to be addressed. I'm sorry you're going through this!