You're in a rough spot right now! I agree with the advice you've already gotten, that time to grow will help, as could the advice for dealing with OS and OALD. I just wanted to mention too about the bottles you're using. I also switched to EPing when BFing was just too painful, and everytime I would try BFing again, it was just excruciating. Finally, one week after going to the meeting my hospital had for newly BFing mamas, I bought new bottles and it changed DD's latch immediately. I'm sure part of it was that she had grown in the meantime while I was EPing, but I know we had a bad case of nipple confusion, because when I ran out of clean nipples for the new bottles and I used an old bottle (I was still having DH give her a bottle in the evenings during her fussy period) it was excruciating the next time I tried to nurse her. Took me a bit to put 2 and 2 together through the sleep-deprived fog. Anyway, all of that to say the bottles the LC recommended that I switched to were the Playtex NaturaLatch. Hang in there! I promise you can get through this!
ETA: It was 11 weeks for us, if that helps. Whenever I read about this magical 6 week mark, then saw it come and go with no change, I lost so much hope. So please don't feel like you're past some cutoff date for your LO to figure it out. Mine eventually did, and she was older than 7 weeks.