I think alot of things factor into a pdoc decision(s) or thoughts.

For instance.. (I am not using anyone's situation as an example )

How long has Pdoc and Patient worked together.
How long has the patient been " stable" as in, not flat on the floor or a hole through the roof.
How many "crisis's" in say the past 12 months
Is patient gaining any skills in Therapy
Can patient apply coping skills when needed
Does a patient have good healthy support system

As you state.... over all you like your Pdoc, well that says alot, really.

I think side stepping and putting your GP in the middle and he/she not aware of it ? I think that just playing dirty and will cause your GP to distrust you (yeah try and get a pain med out of them even if your arm is hanging half off after that) or more likely he/she will flat out give you 30 day notice to find a new GP , yes that can and it does happen plus its legal. ( If your GP would be willing to give a known Bipolar I patient an AD well then she should report back to medical school to be honest, as she should certainly know better than to play with that kinda fire)

Maybe your GP will never know ? Sure that's possible, but if you go zooming and go through the ER , well a copy of your ER visit will typically be sent to your GP and your Pdoc, unless you or family doesn't answer that pesky question of " who are your Doctors" and "what medications are you on "and you just happen to go to an ER you haven't been to before. Sad thing is when we are usually a total mess we can't think to remember who we tell what too.

No personally I would not chance it as finding a good decent pdoc is about as hard as finding a good fitting bra , a car payment that you can "really" afford and a free trip to Vegas, all in the same week.

Yes be your own best advocate, Go armed with a history of yourself.. as in .. Okay in the past X months/years I have gone haywire X times due to "situational" or maybe "med induced" X amount of times. Make sure you can rattle off all the meds and med changes that have taken place in said time and how they effected you.. Yes ! seems like a truck load full of information to gather and process , right? Okay this is what your Pdoc has to do , for you and how many hundreds of patients.

He/she can't possibly know all the in's and out's like you can.

If you can go in armed with knowledge and a time line it will help you show that indeed there is room to wiggle.

I see your Bp I and only med you have listed is 300mg Lamictal? Is that the only medication across the board your taking, no other medications Your GP doesnt prescribe you anything, If Lamictal and Vit D is your only medications, then when was your last complete blood work done? Thyroid has a shifty way of going sideways that can be the cause of depressive feeling, Hormone levels too. Any Benzios? Yep they depress the system plus loads of allergy meds and lord knows even benedryl can drag a mood down if your drug sensitive, Again this is all info you can "present" to your Pdoc

I know most Pdoc's tap out lamictal at 300mg but I see many will go ahead and hit 400mg in hopes that it can nudge someone up enough.

I'm certainly not a Pdoc , but I have been around the block many times and I have worked for Doctors of all sorts my entire life, So I understand what my Bipolar looks , feels and acts like for the "most part" but I also know how Doctors often think.. "Do no harm" Yep that , 3 words. No decent Pdoc likes to see one of there patients need IP or want to hear that they harmed themselves, So they do often Err or the "safer" side, or what they think is "your" safer side, but they are not you...

So if going in armed with all kinds of information doesn't get he/she to sit up,take a chance make a change or at least "consider" a possible change. Ask if you can both agree to give it another 30 days and then revisit it. If your Pdoc shuts you out and says " Nope, see you in 3 months" Yes ,then you need to find a new Pdoc.

Anyway , I rambled a lot I am sure, Just things to consider