Happy birthday!! MDMA is definitely a better birthday treat than coke. 2C-B, MDA, or mushrooms. Coke is one of those things like champagne. It symbolizes a certain status and luxurious decadence but the execution rarely matches the reputation.
Hopefully you've got the real deal not the Shaq diesel. That's one advantage to cooking it. Lot of people put bass hits down but I much prefer it to horkking down line after line of baby laxative. I have a friend who used to say, 'why is it when I think about doing coke I feel like I have to shit?' That was 25 years ago, I don't think they use the same baby laxative or smuggle the stuff in the truck gas tanks. Seemed like there was endless amounts of that bad shit.
I agree with @Haliff2, go easy on the ticker. Especially if you don't have a tolerance. It doesn't take much and it's easy to keep taking more. It took me 20 years to realize the bad effects I was used to. Paranoia, racing heart, insomnia, grinding teeth, headache. Were from doing 10 times more than I needed. Much more enjoyable in smaller doses. But it's your birthday I'm the last person who can tell someone else to slow down...