a few years ago i thought i was clever doing just a dianabol course, didnt use enought pct and got myself a nice lump behind my left nipple

about 4 years on and been training about a year i want to TRY and do it properly iv got some tri test 400 which iv started last monday 2ml a week

am i best taking something like nolvadex all the way through to prevent it getting worse or will i be ok to take it at the end of the course?

also if i do take it all the way through, will this reduce my gains

thanks