What Should I Think About This?

I had unprotected anal sex (I was the bottom) with two men in the last week:
1st Man) Tested HIV- within last month and said he had had no other sexual partners in over a year (I do believe him BTW). I saw his HIV Neg results.

2nd Man) Tested HIV- 6 days before we had sex. I saw the results sheet. He's promiscuous and I am mildly worried.

Question 1) When should I get tested to put my mind at ease (1-2-3 months?), and
Question 2) How soon after someone gets infected with HIV can they infect another?

Many Thx  :-)

[Teak]

3 months after your last unprotected anal sex. Use condoms correctly and consistently and you won't be putting yourself or anyone else at risk.