You are not weak for needing a doula, more support, better education and information etc.
But at the same time, women who choose to have an epi are not weak either.

I have found that in all of the pg books I have they are promoting not having any drugs whatsoever and really guilt you into it ("Oh, your baby wont be able to feed properly afterwards, you wont be able to push, you'll have to have intervention" etc etc). Just as it is dangerous "promoting" epi's etc, I think it is just as dangerous to rule them out all together. If a woman is made to feel like she has made a bad/wrong decision by having one then surely this can be just as traumatic as any other negative experience in birth.

I believe that whatever you find works best for you is the best option, and you shouldn't have to feel guilty about it. 3 of my girlfriends gave birth at around the same time as me, 2 had epi's and had no intervention, 1 had no pain relief and had no intervention. They all have their babies now and no regrets about their labour and their choices. Like I said (and many have) it's all about being informed beforehand- but don't let people scare or guilt you into thinking the decisions you make are "wrong".