Go for it if you feel like it, honestly! Once the baby comes, you won't even find time to sleep, let alone anything else. Just be comfortable and don't overcomplicate things.
Listen, unless your doctor has specifically advised pelvic rest due to some issue, normal sex is absolutely fine. It doesn't affect the process of conceiving. Just don't stress your body too much.
In our family, elders advise being very careful during the conception window. However, my doctor clearly told me that normal intimacy doesn't prevent conception. If you have any medical history, please do check with your gynac once.
Usually, if there are no complications, it is fine. But when we are trying, sometimes it is better to take things gently. Ghar pe mummy hamesha kehti thi keep a calm mind and don't exert too much physically.
I was so terrified of this when we were trying to conceive! I kept thinking what if it disturbs the implantation process. But honestly, it is totally safe and natural, just try to stay relaxed and don't panic like I did.