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I would suggest you find a good psychiatrist since you have not seen one in years. They are experts in mental health where your GP is not and sounds like they may have prescribed you the wrong medications. There are numerous medications on the market and with the help of your psychiatirst you should be able to find one that works for you. Once you get set up with a good psychiatrist see if they can recommend a good therapist. They often times have one they work well with in their office and can assist in your treamtent together as a team which is beneficial to you.
Even though you feel there is nothing to talk about much of what your dealing with needs to be talked through and for you to learn how to handel what is going on especially if you want to get pregnant. It never hurts to have a professional help you through what is going on right now at least until you feel that your moods are stable and you are feeling better.
I hope this helps get you started on the right track. Please let me know if I can assist with anything else!