This is Dr. David
yes, I think you will be ok.
perhaps the implant was pressing on nerves which cause pain in the tummy.
do you have a uterine IUD device implant?
perhaps his large penis was causing you pain when hitting your cervix.
this can pains pain in your tummy.
you might noticing spotting from your vagina after sex because of trauma to the cervix.
if you have a uterine implant, this should keep you from being pregnant.
a condom is always safer in decreasing chances of STDs.
let me know if you have questions
I have nexplanon implant
I had it for a year now so I had a period came back last week, very slight spotting bleed.. I did had pain period which I know it normal.
I regular had sex with condoms all the times since then... then last night without it.. I wouldn't be too sure that I wont get pregnant again .