I had my first baby 9 weeks ago.
Along with a lot of medical complications, I just couldn't cope with BF at all. I was miserable, crying, depressed, exhausted and totally worrying about whether my DD was getting enough milk.
My boobs were engorged, painful and I had mastitis.
After 19 days I broke down in front of the MW who immediately told me to stop. She said I shouldn't be made to feel guilty about not BF'ing. My baby would be absolutely FINE on formula. To deny my baby of my love, time and attention was FAR WORSE than giving her formula.
I cried for a week after stopping out of guilt.
My DD is happy, thriving and nourished. It was the best decision I could have made in my circumstances.
If I have another baby I will give BF'ing another go. Maybe next time it will work. Different baby. I do believe bf'ing is best so of course, we all want the best for our babies.
BUt you know what. I hate it that some people (including some posters on here) will try to make you feel like a bad mother for not breastfeeding.
No one knows your situation other than you. I still have days where I feel guilty and actually days where I miss bf'ing (strangely, given the pain I had! ).
At just under 3 weeks old my DD had no idea at all that I'd swopped my boob for a bottle. She was absolutely FINE. (FWIW avoid Tommy Tippee though if I were you! She did not do so well on those bottles and has been a different baby on Dr Browns! )
Honestly. From your post, I think you'd be mentally happier/better off if you stopped. Yes, of course breast is best. It is also better. BUT if you did a survey of intelligent, healthy and happy adults to see who was breast fed and who was formula thread I think you would find absolutely no pattern whatsoever!!! I was formula fed and I have 2 degrees!
So, personally, if I was you, in your situation as you describe, I would stop beating yourself up, get yourself to Asda and get some Aptamil and Dr Browns bottles and get your life back. 