Thanks for your query,based on the facts that you have posted it appears that you have what is called as Azoospermia
.and your sperm count
is fluctuating over a period of last four months.
Truly speaking there are no medicines that can increase sperm count however Following measure will help you to increase sperm count .
1) Practice regular exercise for 45 minutes followed by meditation
for 1/2 an hour in the morning.
2) Take high protein diet rich in vegetables and fruits and Vitamin A
3)Take anti oxidants like Almonds 5-6 everyday..
4) Avoid alcohol and smoking..
Repeat semen analysis
after three months under ideal circumstances (After abstinence for 3 days ).