3 days post op, is it okay to removed my post surgical bra? Would that have affected the results?

You should be wearing your bra day and night for the first eight weeks after surgery. This provides the support you need while you recover. Having said that however don't feel too badly about not wearing it for a few hours that one time. As long as you wear it religiously from now on it should be okay. If you have serious concerns please talk to your surgeon.  

It's difficult to say what could've happened but let's stay positive.  As long as you didn't lift anything 15lbs or heavier or do anything strenuous, you are most likely just fine.  I allow my patients to remove their surgical bra for an hour or two to wash it or to give themselves a break from wearing it.  Don't worry too much over this, but it is important that you follow your surgeon's post-op instructions and wear your surgical bra for as long as instructed.  Best of luck! ac

Is very important that you speak to your plastic surgeon and follow the surgeons advice about wearing your postsurgical bra.  Do not follow recommendations on the Internet given by people who have not examined you.  However based on your question I doubt that you have cause significant harm.