This is a tough call. Only you can make it, in the end.
I've been there. Bruised ribs so bad I could not take a deep breath for a month. Picking gravel out of my knees and elbows. Giant hematomas bigger than two hands that giggled like a boob and hurt. Had a rattlesnake take a swipe at me and just missed me and somehow missed getting caught in the rear wheel (I promptly crashed anyway in the panic and scooted on my but as fast as I could away from the bike and snake). Lets not forget the heat patches- one of which I forgot to remove (in the car on a road trip) until it had burned me. I am sure most of us here can tell you a similar story. But you know what? Most sports have an element of danger, unless you are into checkers or playing Monopoly. People get hurt doing all kinds of things. Rodney King drowned in his own pool, Sunny Bono died skiing. Weigh the chance of getting hurt against the fun you are having (if you aren't having fun that makes the choice easier), and against what else you could be doing, using your own yardstick.
Hope you heal up quick, it sounds like you took a tumble today . Yea, it can be frustrating and painful.
Tzvia- rollin' slow...
Specialized Ruby Expert/mens Bontrager Inform RXL
Specialized SWorks Safire/mens Bontrager Inform RL
Giant Anthem-W XT-XTR/mens Bontrager Inform RXL
Fuji Newest 3 commuter/mens Bontrager Inform RL
Novara E.T.A commuter/mens Bontrager Inform RL