Oxandrovar is an ox bro. I ran my first cycle at 2 caps a day and never cranked it up. I almost always crank it up too! I had that lethargy you speak of though the gw from sarms 1 and n2guard from n2bm helped. I also ran aromasin from ag-guys as my ai but this stuff is a very powerful oral. People get their panties in a bunch when you compare legal PHs to steroids but PH is just a nice way of saying "legal steroid." Some PHs have been banned and once studied by labs, it emerges that some are more powerful than illegal juices. I think Oxandrovar is so flexible. You can run it as a bulking kicker, you can throw it in a recomp, you can stack with test and sarms like osta or lgd, there are a lot of possibilities.
In your case, you figured you handled the 3 caps toward the tail end of your last cycle so this cycle you should be able to come out of the gate at 3 (or at least tapered up to 3 very briskly). This is not the case when you have given yourself very little time to rebound. Your body is still recuperating from the last run and then you threw something heavier at it. Steve always says to add the cycle and the PCT together. After they're finished, take the same amount of time off to recover (unless you want to cruise on test).