What Should I do?

So last month I took two first response tests and I checked them ten minutes later. One had a faint pink line while the other was negative. One leg has been sore and I been sleeping a lot lately. My boyfriend says I am moody too. From what we know of nothing has never gotten inside of me but it sometimes get close. Is it possible that some has gotten in me and that I may be pregnant? Should I hate another test? I'm suppose to start my period in a week but my last period was light pink one day and nothing another day. Went on for 3 days then I had heavy bleeding for one day and back to the pink for two days.