Don’t have to stop sex at all if u enjoy it and your pregnancy is normal. In fact my doc says it’s good to have sex from week 36 onwards to soften cervix with sperm as sperm emit chemicals to soften the cervix, getting it more ready for birth!
Then you decide whether to follow professional advice or article advice - which one you think is more credible and just stick to it. It’s your body so it’s up to you!
EL W