Pregnancy diagnosis. Not? will it harm?

I got periods on 21 March , it's 42 day on today( 1 May 24).I do have period cycle of 30 days sometimes got periods after 28 days. Sometimes it got delayed upto 33 day only not beyond that. In shot, my periods are regular. I was doing gym exercises including weight training till 36 day. AS we were planning a baby since 2 years.I got hcg tested (preganews) on 37 day it was T faint line but doctor told us it was positive, next day on Saturday subday on 38 ,39 day it came - ve ale, sonography also done on 37 day but doctor didn't found any sac.Today42 day is there still didn't got any periods so want to confirm if pregnancy is there or not? I am doing blood test of beta hcg on tomorrow/day after tomorrow.please give me suggestions.If pregnancy is there then I am worrying about hi functional training and weight training I done earlier for weight loss. Will it harm?please confirm. please reply me ASAP.