Anyone who is opposed to abortion, is also opposed to most methods of contraception.
From the prolife.com webpage (I won't link to their page):
Physicians across America -- and around the world -- are now confirming that the Pill, IUDs, Depo-Provera and Norplant cause early abortions.
The conservative wing of the Republican party is knee deep in this kind of thinking.
When it comes to this issue, Blue Dog "Democrats for Life" stand shoulder to shoulder with their Republican allies.
That is why, when it come to denying insurance coverage for contraception, most Republicans (and Blue Dogs) stand with the health insurance industry.
Here's an unsurprising fact: at the very same time that they are denying a woman's right to reproductive health care, these very same men are covered for erectile dysfunction.
Once they've stripped a woman's right to choose from HCR, what makes you think they won't do the same thing to contraception?
Maybe when you talk to your wavering Representative, you can ask them why they are threatening your access to birth control. Ask them how they think the women in their district would react, if they knew your Representative was threatening to end most birth control.