Mommys!! Help!!!

I guess it is very safe to say that my child is over powering me these days, I say no..he does it anyways, or he bites me, or hits me, as much as it makes me want to laugh because someone so little can be so MEAN. I can't actually always laugh, I tried ignoring him, tapping his hand when he hits me, then he takes it as a game and keeps hitting back and forth, so therefore that failed. I tried putting him in timeout (up in his bed) for 15 minutes and he screams the whole time. If he doesn't get what he wants, when he wants, he won't settle for anything. If I try giving him want he wants (after he is already screaming mad) he throws it. Then I accidently laugh :/ and he goes around the house throwing EVERYTHING that gets in his way..lol  He has recently started walking, well let me rephrase that "running" & has found out he gets places faster than crawling, so yes it's tiring! I get excited for 9:00 bedtime pretty much every night... lol
Okay ladies, that's it..I have tried everything there is to try out there, I don't know what I am doing wrong? I don't want to do something wrong and he will always over ride my authority, even Marc can't control him. He will (sometimes) listen to him when he says no, but very rarely...at times Marc is like "Ashley, GET HIM. I don't know what's wrong with him" LOL then i return with, and I do?? I know I am the adult and he is the child, but most of the time I feel like it's the other way around...So any advice in what to do would be greatly appreciated..do I let it go? Do I discipline him in a different way? He knows what the word NO means, but he doesn't care...hmm wonder where he gets that from?