Gf (26f) lost trust in me (28m) is it mendable?

Last night when I was in the shower, my gf looked thru my phone. She found I still had contacts saved of girls I had dated in the past, even tho I told her I deleted them. She also saw that my ex and I had still been texting just a couple months before her and I started dating. I then told her I also took an edible a couple weeks ago. When we first started dating she emphasized how much of a dealbreaker smoking/edibles are but that if I ever slip up to just tell her and she’d be understanding. She is very upset and is saying she can’t trust me since I didn’t tell her right away, and she’s also upset from looking thru my phone. We’ve been dating about 4 months.