what is this lump I feel right in my pubic area?

I'm taking birth control, so I'm not pregnant because my doctor did a test before giving me it and I haven't had sex since.
I'm a week or so into it and I've had so many different symptoms. And they're all pregnancy symptoms so it's freaking me out.
When I push down on my lower abdomen I can feel a ridge or lump, it's freaking me out that it's my uterus, but some people say it's my bladder. 
Can anyone else feel there's? 😩

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