Switching Birth Control?

for the past few months i have been on IC Vilore b/c and this sunday (9th) i went to pick up my new pack and they said they were out of mine so they gave me Kariva the lady said its the same thing and thursday night around 11 i had s.e.x and he accidentally came into me i have only been on kariva for 5 days am i ok? since i have been on birth control for a couple months or do u still have to wait 7 days if you switch too a different name a guy never has into me before so im nervous. should i take plan b just in case? and if i do will i get my period or will it come in 3 weeks when im suppose to get it? or both?