No there is no happy pills, he is right. But we can find happiness outside of all that. It's very possible. Getting off a med that makes you feel sort of tranquilized, like you said not bouncy/zestful would be a good place to start. Antipsychotics / nueroleptics (seroquel) whatever you want to call them, are also known as major tranquilizers, which is no wonder why many of us feel like a bit of a zombie on them, no zest.
You also had a baby, so could be some post partum depression going on too? Also you said you a newly dx as Bipolar, sometimes it takes a while to come to terms, accept the dx, and figure out what you are going to do with it all. And by that I mean we all have different ways of taking the dx on, different perspectives on it and how we will live with it. Perspective can make a big difference in the out come. Finding what works for us best personally takes a while.
Have you been looking into other treatment other than meds. While they can be some help there are often other issues going on that we can work on. Pdocs do not deal with this tho, so we have to do some of the investigating ourselves.
For me, I had a lot of past problems that I needed to heal from, I had cognitive distortions in thought ( negative thinking, black and white thinking, stuff like that ), low self esteem and confidence, just some of what I needed to work on. The meds tho could not help with that stuff, and all that stuff makes a big impact in our mood.
I don't know if you have worked through this kinda of stuff with a T or on your own, just putting it out there.