As per your description,taking double dose of Parlodel,Vasotec,Effexor,vitamin C and D3 and methadone don't cause any serious harm.
Your Wellbutrin dosage is slightly high.
Usually all these medicines are well tolerated.
You should miss your next dosage and monitor your blood pressure.
You should take your next dose of these medicines a day after.
If you develop dizziness,fast or irregular heart rate,sweating,drowsiness,nausea,weakness then you see your doctor ASAP.
If your blood pressure gets lower than 90/60 mm Hg then see a doctor at ER.
Otherwise you should eat in small amount frequently.
Also maintain a good hydration.
Just keep a watch and monitor your blood pressure,pulse.
Most likely you 'll be OK.
Feel free for further queries. It's good to discuss rather than quit.
Your satisfaction is our goal.