Beating yourself up about it isn't going to do any good. At least you were safe with other partners and up front with your current one. That's a lot more than other people do. Anyways best of luck :)
Yes it is scary but I feel so guilty that i wasn't more open in the past.
Showing or not showing signs doesn't exactly prove anything. The only way to really know is to have a full STD screening done. Also make sure you are being tested for HIV and AIDS. Scary, I know, but better safe than sorry. If the results come back negative then you are in the clear.