What Causes Delayed Periods With Sore Breasts And Cramps?

okay, my last period was may 14th.. I should have started my period.. i have the tender brests, bloating, and cramping off and on throughout the day.. they are worse at night for some reason.. i feel pressure in my vigina like i am getting ready to start as well... also i get the cramps everytime i have an orgasim.. it lasts for 2 or 3 minutes and goes away..

I also just got done with taking a yeast infection med otc lastnite...

why am i feeling like this and what should i do..

i went to see an gyno last month because prior to that i went 2months without my period... everything was fine...

i was never regular when it came to my period and i just started having them agian.. this would be my 3rd in 3 1/2 years, i use to use herion so it took it away for awhile.. i got clean and this is where i am now. can u give some advice?