Should be grateful...

I am 5.4 weeks today, and have virtually NO symptoms. My boobs don't hurt, no morning sickness, no overwhelming fatigue. Just a slight backache, and a stretching feeling in the crease of my thigh, (although my back was REALLY hurting last night.) considering how awful I know pregnancy can be, (this will be my third, and two/three miscarriages), I should be counting my blessings, but I honestly think I'd rather be puking my guts out occasionally, just so I know everything is ok. The pulling stopped for most of the day, and I got worried. I have never been so relieved to have a backache in my life. I know it's weird... But I'm worried that maybe a lack of symptoms means something is wrong.