Every day since Monday I have had heartburn at almost exactly the same time โ€” around 5 pm.

Possible cause 1: Something I've been eating, the only common food item being a granola bar I've eaten before with no heartburn.

Possible cause 2: Some weird side effect of quitting smoking. But I never smoked more than 4 "light" cigs a day. And I've had no other side effects from quitting. And I quit more than a week ago.

Possible cause 3: I'm pregnant and I don't know it. Some pregnant women have heartburn every day, the internet tells me. I've been on the pill for 2 years, but my fiance and I only went off-condoms for the first time a few weeks ago. And I've had a placebo-induced period since we last did it. Could I possibly be pregnant? I may bite the bullet and do a pee-on-a-stick test if I have to.

What's happening GT? Share with me your theories/help me debunk mine.