Is it normal to have frequent clear discharge by the end of 4th week ?

Yes faheem.. White dischrg is pretty much common

Yes it is. Pls read Vaginal Discharge During Pregnancy!!!!!

Vaginal Discharges - The Body’s Defensive Mechanism

Pls read everything under Pregnancy Must-Know

Although I checked but I had missed miscarriage earlier so this time I want to be double sure will everything,last time I had all the symptoms till 8th week but then came to know feotus stopped growing beyond 6 weeks,it was very painful