First of all, I think most of us on here are just kinda going to stare at your pictures a while longer...
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Ok.
You want an honest opinion: your shape right now is what I consider to be the most attractive in a woman. I'm of the school of thought that men are supposed to have the definition and hardness, women are supposed to be fit.
But if you want those abs to show through, and lose more fat in general... anavar isn't your solution.
Anavar is an anabolic steroid. Granted, it is "weaker" and a steroid of choice for women looking to gain muscle size, but it isn't what you need. Your bodybuilding friend was wrong, and the people suggesting
clen were more on track.
If you have your diet in check, eating healthy and you know how many calories you eat a day... remember that to lose fat you need to restrict those calories.
If you're doing all that and you're making progress but want a little extra... kick... that is where the
clen/t3 would come in.
Honestly though, if you have more than four weeks before you go to Miami, get ahold of some ephedra (the real stuff, not pseudo or ephedra substitutes) and caffeine pills. Research "ECA" stacks and follow that for two weeks on/two weeks off and repeat. With the right diet and exercise, you'll be shredded in time for Miami and no "strong" drugs used.
There are a few females on here who may have more appropriate advice, but I'll leave that to them.
Once again, you look fantastic