Some questions

I am new to trying to conceive. My husband and I have been BD every other day since CD9. Since a few days ago my uterus and least I feel like thats the area fills kinda like it is full any one have any idea what that could be? Also I see a lot of things about tender breast... Is it tender breast all the time or can it be off and on? Also i get a pain in my breast at least a few times a day could this mean anything? Like I said I am new to this and just had a few questions.