Reading into symptoms..

Sometimes I'm not sure what my body is telling me. Last month I had sore breasts and cramping 2 weeks before my period was due and I thought it might be the month we conceived. This month (On my fertile week now) dh and I just bd two nights ago and I had like a hip joint pain yesterday all day (really uncomfortable) and today intense sharp cramps. I'm only day 3 into my fertile week and I'm not feeling much up for more bd due to all this cramping. But Unlike last month we did start trying early in the week, which I hope will have a good outcome.
How did you ladies experience implantation cramping (how soon?) thinking all the cramps are my body getting used to my husbands sperm? Idk thoughts?