What a mixed up group of symptoms. I think the only advice I have for you is to "chart" all this. Remember that doctors deal in measurable facts–not generalities.
For example: "My pulse is really fast" is different than Pulse = 120 at 3pm, lasted for two hours. No activity to trigger this.
SYMPTOM and Date
Heart rate:
Number of hours slept (or NOT!)
Weight:
Nausea:
Joint pain:
REMEMBER: IF YOU BEGIN TO ITCH, OR RUN A FEVER–CALLYOUR DOCTOR IMMEDIATELY AND STOP THE MEDICATION.
This can be a start, at least.