Firstly, well done on feeding her and getting to 8 weeks. Many people do not make it that far. So, you need to be really proud of yourself and what you are giving your baby.
I would say get yourself along to a BF support group if you can. I found that so helpful for practical tips and advice and also a chance to discuss issues and problems weekly to get it all off my chest (excuse the pun!) and feel supported. I think there are BF cafes or support groups in most areas, try looking through NCT or your Health visitor / NHS.
I experienced issues very similar to what you describe in the early weeks, in fact I had very severe pain on feeding up to my DD being 10 weeks old. The one thing I would say is that in my experience and that of a lot of other mums I know, it just starts to get easier around 8-12 weeks so I hope that helps to encourage you to keep going. After my DD got to 10 weeks, the pain subsided, her feeding got much quicker and more efficient and it just all clicked into place. At that point I was so glad I persevered to get to the point where it became so easy and much quicker and more convenient than bottles. Try to see these early weeks as a kind of investment to reap the rewards later when it does feel easier.
One particular tip for what you have described is to kind of go back to basics with the latch. I found leading with the chin and waiting until DD mouth was really wide open really helped to get a good deep latch. Another thing you could try is laid-back breastfeeding where you lie back, relax and pop baby on top of you and let them find the nipple and latch themselves. This can really help with feeding problems like positioning etc. Here is a link
www.nct.org.uk/sites/default/files/related_documents/Laid-back%20Breastfeeding.pdf
Of course, this kind of latch could indicate that there is an underlying problem such as tongue tie so don't just suffer with this, seek help and specifically get this checked out if the pain does not subside soon. Again, here's a link themilkmeg.com/category/tongue-and-lip-tie/
Good resources to look at are The Milk Meg and KellyMom (both on Facebook and they have websites with good advice).
Try not to worry about feeding discreetly (easier said than done, I know). I found my confidence just increased with time. Again, a BF support group or going out with a friend might help with this.
Good luck and I hope it all works out for you whatever you decide to do.