Potential exposure to Syphilies

Hi guys, need advice po. Last Tuesday night, may sexual encounter ako with someone na may active lesion/sore sa shaft ng penis, and sabi niya from shaving daw pero after researching pagkatapos namin, dun ko napagtanto na baka syphilis siya

What happened was I jerked him off. Hindi ako sure kung accidentally nahawakan or nadikit yung lips ko sa lesion kasi medyo nakainom ako that time, pero pretty sure ako na hindi ako nag-BJ. I also licked his b*lls

First time ko magkaroon ng possible exposure like this, kaya medyo anxious ako.

It’s been around 4 days since the encounter, and I already consulted a doctor. I was advised to take doxycycline for 14 days.

My questions:

• How high is the possibility na mahawa ako based on this type of exposure?
• Since I started treatment after 4 days, can it prevent syphilis from developing?
• Should I still get tested, and kailan yung best timing?
• Is there anything else I should do or watch out for?

I’d really appreciate advice from anyone who has experienced something similar. Thank you!