Thanks for sharing your images and your story.Without doubt you need a lift.An implant alone will make the breasts look worse rather than better.You look like you have enough breast tissue, so the best option for you is a breast lift without an implant and using a concept called "auto-augmentation" to give you volume.
I hope this helps and good luck.

Hi Jenc,
Thanks very much for your question and photos.
Yes, you need a lift.  Without it you are very unlikely to be happy with the results of any sort of breast surgery.  I think you are correct that an implant is likely to make the shape worse.  Fortunately, you appear to have good breast volume, therefore I think a lift alone will give you an excellent result and you do not need an implant.  
I suggest you have an in person consultation with a plastic surgeon.  Most likely you will find the cost of a lift or even a breast reduction is less than you think.  Depending on your individual circumstances (i.e. medicare or private health insurance rebates may apply) you may find a these procedure are less expensive than a breast augmentation.
Kind regards,
Dean

Thank you for your question and photos.
You require a lift.  This will reposition the breast tissue on your chest wall, hopefully giving you the look that you are aiming to achieve.
Kind regards,
Matthew

Hi JENC.
Without a doubt, you will require some kind of lift/reduction in order to reposition your nipples and give you better breast shape. From your photos, the nipple and most of your breast tissue are below your breast fold. If you have implants alone, your breasts will "fall" over the implants, and this will not be a good look. The question you need to ask yourself is what size you would like to eventually achieve. If you are happy with the current "volume" of breast tissue but would like a better shape/appearance, then a lift will suffice. If you want a smaller volume, then a reduction is indicated. 
All the very best.
Warm regards,
Dr Ray Goh