Blood clots can be treated with anticoagulants, such as warfarin or coumadin as mentioned by addictedrn73. However, depending on the type of clots, location of clots, circumstances related to the blood clots and any underlying diseases that were associated with the clot, these factors would determine the necessity as well as the duration of anticoagulation.
With respect to your other symptoms, you need to see an internist who can tackle all of your problems.
Are you taking warfarin to prevent clots? Has your doctor done given you a reason as to why you are susceptible to blood clots? Usually people with a history of blood clots will be on warfarin for the rest of their life. Im not sure of any other meds you are taking but dizziness and nausea is a common side effect of many meds. Especially meds for heart and blood pressure. And it has been a hot summer..are you getting enough fluids. Nausea, dizziness and diarrhea are symptoms of heat exhaustion and electrolyte imbalances. Lastly, do you drink alcohol or take drugs recreationally? Suffer from stress or anxiety? All of these are factors that can attribute these symptoms.
And what is your question?