adult adhd

So, I habe always thought something was wrong with me. I was never a social person but woukd always go over the top to get friends. at the begging of school years i was focused and interested then by january i wanted nothing to so with it. I worked dead end jobs and never really felt anything. I got pregnant at a young age with my first amd had my second when my first was 17months. thays when things got stressful. I couldnt mutli task I either focused on the kids or the house. my relationship was always last. then you add the third kid into the mix and chaos insues. I have three kids to look after and in a wreck of course after having kids everyone jumps to ppd or ppa but i had a feeling something else was going on. So i made a list and gave it to my gp and well she thinks its more adhd than it is anxiety/depression. Which makes more sense to me than depression. She precribed me biphentin 15 days on 20mg and then 15on 30mg has anyone taken this drug for adhd? also how did you find out you had adult adhd?