Aw sis, I understand kung bakit ka worried, especially after what you went through last year, pero ganyan talaga sometimes, the tenderness comes and goes at 6 weeks, hindi consistent pa, kaya normal lang yan! A few of us in my mum group had the same thing, one day pasakit pasakit, next day wala na, tapos bumalik ulit after a few days, so don't panic just yet. That said, since you have that history and peace of mind is important, I'd really suggest reaching out to your OB para ma-check and ma-reassure ka properly, they can do an ultrasound and make sure everything's good, which will probably help you relax more. Wishing you all the best po, fingers crossed for you!