Low Sperm Count?

Sir,
Myself and wife havebeen trying for a baby.But nothing has been working out so far.I had my sperm count tested and found the following.:

Volume: 3 ml
Color: opaque gray
Viscosity: Normal
REaction :Alkaline
Fructose: Positive
Total Count: 18 Million/cc
Active motile 1/2 hour : 40%
Sluggish Motile 1/2 hour : 10%
Non Motile 1/2 hour: 50%
Active Motile 2 hour : 30%
Sluggish Motile 2hours: 10%
Non Motile 2 hours : 60%
Normal Forms : 97%
Giant Head : 1%
Pin Head : 1 %
Double Head : 1 %
Pus Cells : 3-4/Hpf

IS my sperm count below normal such that it will affect my wife getting pregnant?
DO i need some treatment forthis. I was suggested to use tablet Potenz 3 times a day for 1 month.Currently i am on this medication.Have not checked the count after taking Potenz..i have been taking this for the last 2 weeks.
Also i heard about Testosterone Injections...which need to be taken continuously for 30days...is this needed ? i dont have any erection problems...etc.
Its just that i am worried about the sperm count...can we have a baby without much problems with this condition...

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