Hello, I am new to this app. Need some female advice or some insight rather.

I have been single for about 4 years now, have had 2 sexual partners since my ex boyfriend & I broke up (years apart) However, anytime I engage in sexual activity I am worried about catching an incurable STD (herpes) to be specific. I always use protection and do not engage in oral sex ( giving or receiving). Last week I had protected sexual intercourse with one of the partners I've had since being single. We spoke about him when the last time he was tested (2 months ago) and him being STD free. However, I can not begin to tell you how my mind has wandered, thinking of how many women he could have possibly been with since then. He claims to always use protection, however, i am not there when the deed is done so i have no way of knowing if he is telling the truth or not. Do you ladies think i am being overly cautious about this? I guess i am kicking myself because i had remained abstinent for so long and knew i was completely STD free ( check up every 6 months). Just the thought of getting an STD is scary to me. My ex boyfriend gave me a curable std when we ever together, i guess that might have changed my entire view on sex.

Any comments, insight? Words of advice? Thank you so much.