Plan b

I had a bit of fun a couple days ago and used gel spermicide and a condom for protection. The spermicide is supposed to last an hour and we finishe maybe in an hour and a half...and the condom broke without us realizing it. I took the plan b pill the next morning. From why I heard it causes a bunch of symptoms but so far I haven't had any. I feel normal. Should I be worried? My period doesn't come for about another week