Welcome to our Forum. the exposure you describe was very, very low risk and I am concerned that your anxiety will lead you to do yourself harm (for instance, squeezing and tearing at the lesions on your scrotum was a VERY bad idea.  Not only could such manipulation lead to a wound infection but your manipulation will make it difficult, if not impossible for a medical professional to determine what is happening.

There is nothing about the lesions you describe which suggest STIs, including HSV and HPV in any way.  If you were going to develop herpes lesions, this would have occurred a week or two before now.  The location of your original rash was not typical for warts or herpes and there are a large number of "bumps" and cyst-like which are a normal part of the scrotum.  Similarly, the spots you have now noticed on your penis are not warts- your description does not suggest them.  It is far more likely that your hyper-vigilance is causing you to notice things that are normal parts of your anatomy. 

My sincere advice is to put your concerns behind you, to stop repeatedly self-examining yourself (and traumatizing yourself) and move forward.  Had you acquired an STI through this very low risk exposure, it would have manifest itself by now.  I hope these comments are helpful to you. EWH