What's going on?

Hubby and I agreed that we were ready to have a baby, but we weren't going to die hard try and just let whatever happens, happen. We used the ovulation dates according to this app, and bd twice during them. The day before peak, and the day of peak. It's been 9 days since peak. I'm somewhere between 6-7 days out from my period. Last night I got this shooting pain in my lower abdomen that I felt in my hooha as well. Since then I've had this dull ache in my pelvic area. I'm bloated, and my boobs are sore and my nipples are way hard(these two have been going on id say 2 days). Do you think that could have been an implantation pain? And would I still need to wait until missed period to test?