May be pregnant but scared...

I m/c in Jan. It was an awful experience. My first period since started on March 1. My husband and I were pretty active during the 2 weeks following my period. I had what I believe was light implantation bleeding between 20th and 26th. I had this the first time also. For the past two weeks my breasts have been really tender and sore. I've been feeling lightheaded throughout the day and experiencing mild nausea. I've also experienced some period-like cramping on and off for over a week. I never had these symptoms before AF. In fact, I usually got strong cramps and gas the day before I would start. But this has been going on for about 2 weeks. I'm scared to test and get BFN, but I think by Sunday if AF doesn't come then I will take HPT. Even if it comes back BFP, I think I will wait to call doc & tell family/friends for fear of m/c again. I m/c at 6 weeks. I want to be excited but so scared of disappointment.