Before I give you advice, when using clen please be extremely careful while taking in any extra energy supplements/pwo's or fat burners, probably a great idea to stay away from them.
I would recommend this: 20/40/40/60/40/40, now here's a mixup between most people, some will do it 2 weeks on and 2 weeks off, while others will go the whole time and take Benadryl at night, truthfully, I think you'd be better off 2 off and 2 on:
This is MCG PER DAY not week
this is what the 2wk off an on would look like; note this is for women not men. Also, this is 14 days not weeks just wanted to clear that up before someone jumps on me.
Since most woman run it up to 80mcgs; I suppose you could even hit 40 a bit sooner and then every few days slowly work your way up to 80, do not hit it full throttle just yet, get a good gauge on how you will respond to it and take it from there. You can always add a bit more, but you can't take it away after dosing and I don't know about you, but sweating, elevated resting heart beat and a few other sides don't sit so well.
Oh you'll definitely have a great amount of energy by your birthday, but don't solely rely on clen; diet and cardio, whether it's walks/jogs/HISS/LISS just listen to your body and you should be good to go.