Normal?!?

Ashley • TTC 2 yr 🌈 Baby

So I’m about 10 DPO, I have horrible heart burn and random nausea, lower abdominal pains. I tested on walmart brand digital and it said not pregnant but my dumbass decided to crack it open(I’ve seen people do it) and there was another faint line. I also took an opk I had extra of and that test came out positive. Could I be pregnant even if my bbt chart doesn’t show a temp rise?!?