Pregnancy test negative but....

Ladies I really need some opinions please! My hubby and I just started trying to conceive. The first day we had sex without protection was the 5th of June. It's only the 20th today but I was supposed to get my period a week and a half ago and it never came (I've never missed a period before). Also I've noticed a copper taste in my mouth and sore muscles along with sore breasts (not so sore they ache non stop but sore to the touch). Even though the test is negative could I be pregnant already or is it just me hoping? When should I try again for a pregnancy test? I don't want to keep just wasting them or getting my hopes up. HELP!! 😊