Tiffany,
What an ordeal to have to go through so close to Rajah's passing. No one here would blame you for feeling such anguish over this. And the fact that he was a birthday present in the first place.....oh my....that would make it all the worse, for sure!!
I won't have to face that yet for a few months, for which I'm grateful, but I DO clearly remember
other birthdays after other huge losses.....no, they're not easy at ALL. Normally, it take me about 3, after a loss, to begin to feel even half-way 'normal' again. This year's for me, will also be extra hard because it's one of those milestone birthdays, and Nissa won't be here to help me through the common angst those ones bring to begin with, much less celebrate it. And we'll be on vacation at the same time, so I'm more than likely to be all OVER the place, emotion-wise, struggling to force food and drink down for a birthday dinner, and feeling like throwing myself in the lake we'll be at instead!
So I really empathize with you about this 'first', and even more. I hope it's 'better' today, now that it's over and done with....a little relief, if nothing else.

Birthdays, holidays, regular days....they all just suck w/o our precious babies by our sides. I'm so sorry.