how much is an overdose of diphenhydramine hcl 25mg

I'm a female im 17. Three night before last night i bought 25 mg diphenhydramine hcl . I wasn't trying to commit suicide but I was trying to go to sleep. I put two of them in a sprite but I didn't drink it at all I drunk like 3 little sips of it , then a hour 1/2 I put three more in a peach soda I didn't drink all of that I took like 3 sips of it . I would go to sleep for like 9 hours at the most and wake back up . Two days before yesterday I went doctor they didn't say anything about it so i'm curious , how long will this last ? I don't like this feeling I feel bad , how can I get it out my system ? What should I do ? It was my first time taking it . in between those drink , i did drink a tab a liquor .