Hi 2 weeks ago I had sex with a condom but it split. Since I have developed one blister on my back which now feels like a burn, my vagina has also become red and quite itchy and I have been producing quite a lot of discharge. I am really scared that this could be herbes and want to know if this is definite signs. I am only 19 and absolutely terrified to get tested. I am always safe when it comes to sex and I don't know if this is just me being paranoid someone please help me !!!