It seem that you are having is erectile dysfunction.
Common causes causing erection problem are stress and anxiety, poor communication, unrealistic sexual expectations, negative feelings about non performance, smoking, alcohol and medical conditions like diabetes, high blood pressure, heart or thyroid conditions, poor circulation, low testosterone, depression, spinal cord and neurological causes. Medications such as blood pressure medications (especially beta-blockers), heart medications (such as digoxin), some peptic ulcer medications, sleeping pills, and antidepressants may also cause erectile dysfunction.
It is only after examination can a diagnosis be drawn and treatment started thereafter.
Sildenafil is the drug of choice for erectile dysfunction. However it is available only on a doctor's prescription who will also assess the type and cause of erectile dysfunction before prescribing any drug.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care.
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