Just getting into edibles

I’ve recently got some gummies that are 5mg THC and 5mg CBD. I took a half of one yesterday morning at 8am and was still totally high when I went to bed at 10pm. The peak seemed to last from about 9am and my thoughts were really coherent until around 4 or 5 in the afternoon and until I went to bed I still felt like I was walking around in a cloud. Is this normal and about how long does it take for your tolerance to take over and ease it back some?