Is it a possibility?! Could I be pregnant?

Hi. My husband and I have been trying to have a family for 6 years... we have not had anything happen.. no mcs.. nothing.

Well I believe Tuesday or Thursday of last week I had what felt like an ache on my left side ovaries and up almost by my rib cage!! This week my boobs (nipples mostly) are very tender and kind of sore. Have had headaches slight back pain.. any opinions?!

I don't keep track of anything other than my period.