I apologize for not answering you I thought you were playing around with your indigestion remark. I am sorry.
When I received the H.S. it was a feeling of great forgiveness and the burden of a guilty conscience was lifted. If you get a chance to read a book called Pilgram's Progress it may just be a blessing to you. The writer was John Bunyan and its a classic.
But assurance for any person should soley come from God. The Bible does tell us to test ourselves to see whether we are in the faith. To examine ourselves to see if Jesus is truly with us. Feelings can go up and down, these are not to be trusted. What is to be trusted is the word of God. If you believe Jesus is the Son of God, not a created thing, but eternal, who has died for your sins and rose again, and you cried out ot God for forgiveness and then live for him each day, then find your assurance in the scriptures. "As many as received Him, to them He gave the right to become children of God to those who believe in His name" John 1:12 The entire context of John 1:1-18 is about the WORD, the logos.
"If you confess with your mouth Jesus is Lord and believe in your heart that God raised him from the dead you will be saved" Romans 10:9
Let the word of God give you assurance. God isnt willing for any to perish but for all to come to repentance.