I wear an A cup bra, is that tough?

I'm supposed to be a C cup, but I wear A cups, is that okay? I something bad going to arise by keeping on wearing A cup bras, or is it okay? I really need to know. Why are you doing this? Is it because you don't enjoy money for new bras, are you trying to hold your chest within for some reason so that any nobody sees it or you basically don't want the jiggle from exercise, or is it because you are looking for more cleavage and "push up"?
It's good to own lots of support - you might be better off wearing an athletic "compression" type bra than an A cup - and attain a little more support and comfort from it.
If you're going for cleavage, you're better past its sell-by date with an underwired push up bra surrounded by your right size - and you'll be a whole lot more comfortable. It can look really hokey to enjoy a "double boob: line because you are pooching out over the top and underneath your armpits. Not even cheap - just bumps contained by all the wrong places. Smooth it out by wearing something surrounded by your own size. If you don't have much money, shift to the Goodwill or some other second hand store and find a bra in attendance in your size for a couple of bucks. It will be worth it.
Why are you wearing an A if your a C? Buy a bigger bra!