You absolutely need to talk to your OB about this - ASAP! And if he starts acting like he's in a hurry, you can politely tell him that the 5 minutes that it'll take to answer your questions may make the difference between you having a healthy pregnancy and baby, or not. He’s your doctor - that’s his JOB. And if you’re still really worried about his schedule, when you make your next appointment tell whoever you talk to that you will need a few extra minutes of the doctor’s time to talk about this and he should plan for it.
As far as what drugs are safe to take during pregnancy and which ones are not, there are some that you absolutely cannot take. However, there are some that they don't recommend taking but the benefits to you may far outweigh the “possible” risks to the baby so you can take them - but only with supervision. Bipolar disorder is a serious condition that needs to be monitored and if you think you’re feeling the effects from it, you probably need medication. Your OB needs to help you with this. Now, if he says that he’s only there to treat your pregnancy you may need to see your primary care doctor about this.... and if you don’t have a primary care doctor you need to tell him that so his office can help you locate one.
Long story short is: don’t let this go untreated - it won’t go away on it’s own. And if you try to ignore it or treat yourself, you may end up hurting yourself or your baby and have to deal with the effects for the rest of your life. Those aren’t odds I think anyone would want to play.
Good luck!!!!!!
PS - Also (and I hope this isn’t the case...), if your doctor ends up being a total a-hole about this situation - switch doctors!!! There are a TON of OB’s out there, most of which would want to help you deal with this. Not to mention, if he doesn’t care now, how do you think he’ll act towards you during your delivery?