First cycle test cyp. 2cc EW

I am at the end of my sixth week. I have gained about 15 lbs. I am happy with the gains so far. I was hoping for more by this time, but I ahve been working 10 hr. days 6 days a week. Needless to say my rest is limited. My diet is good and workouts have not been as intense as they were in the 3rd and 4th weeks. The overtime is to end neek week. I hope to have a good last 4 weeks of the cycle.
I was going to add some winny tabs to the last 5 weeks of my cycle to cut up and look harder but some people on here said only test for my first cycle. I am not sure why yet, but they were some well respected bros so I am listing to thier advice.