I personally don't believe you can manifest 'winning the lottery' by just visualizing it. If that were true why don't we all just go lay on our couches and visualize all the things we want to accomplish.
eg. If I meditated, visualized, believed that I could be the world champion triathlete. Let's say I perfectioned the art of visualizing, meditating and all of these things.
I will never be the worldchampion, unless I work hard for it! Really hard!
A wise man once said: You can lay on your couch visualizing you are going to win the lottery and they will come take your couch away (with all the rest of your furniture)
To really attract something in your life you have to belief, visualize AND take action! Don't waste your time waiting to be 'rescued' by the lottery. It won't make you happier. There is an 80% chance you'll be broke before you know it and you'll wish you had never won that money!
oh, and since you said you wanted to win the lottery, wouldn't it be better to specify a certain amount of money. Because if you win 5$ next week, the universe will say: Your wish was granted!
But I still wish you the best with all your goals!