Lemon juice = heartburn. Is it necessary to take with Olive Oil?

I took 1 tbsp on Olive-Oil tonight and chased it down with 1 tbsp of Lemon Juice and 1 tsp of Epsom Salt with a cup of warm lemon water. I don't know if I'm supposed to do them all at once but I did tonight. I'll do this every day to stave of any attacks. After babies are born I'll do a complete cleanse as long as it doesn't interfere with breastmilk.

Problem: I'm getting really bad heartburn from the Lemon Juice. I don't know if taking Tums, Maalox or Pepsid helps or hinders the daily cleanse though. I don't know if taking the Lemon juice is necessary or not. I've also been told to try fresh pink grapefruit jice as it's the only fruit juice that will liquefy the oil. I'd get heartburn with that too.