Need advice about my breast size/bra and why my breast hurt.. Please help

Bria

So I’m almost 21 and my bra size (according to Victoria’s Secret) is a 34-36DDD

I actually think I’m a 34 cause the band on my 36 bra is too loose and I have it on the tightest notch.

Could this be one of the reasons I’m experiencing pain?

Or could it be that my bust size is too heavy for my weight or something?

I have no idea but what you do think I need to do to solve this problem? I know I need my right bra size cause I know I don’t have mine and I’m honestly not going to Victoria’s Secret anymore since I can’t seem to find my right size there... ether it’s too big or so tight that the wire is digging into my ribcage..

If I could have some suggestions on other lingerie/bra companies that would be better for me and also what style bra would support me better that would be awesome!

I know this will be a lot of information but I feel like it needs to be said so I can get the best advice possible- my breast shape are bell shape? I’ve seen that’s what some people call it, but they droop down, and aren’t perky at all..

If anyone out there who had this problem and found a solution please give me some advice! I’m tired of my breast just randomly hurting even after days of not wearing a bra..

Thank you in advance!! (Sorry this is long)