Two implantation dips? Could this be twins?

Right now I'm 15 DPO and during my first implantation dip at 8 DPO I got super bad pains that day on my right side and stayed pretty consistent for days to come.  I took a pregnancy test at 10 DPO came out positive.  Then on 13 DPO I got another implantation dip and that even I got super sharp pains on my left side.  My temp has jumped back up but now I'm really noticing the breast pain, nausea, cramps on both sides, more like severe sharp pains.  Has this happen to anyone that is pregnant or had twins??? I only read one mother experience the same thing and was expecting twins.