possible stricture or food not agreeing

just after dinner last night i started to feel like there was a bit of a lump under my breast bone. It went away but came back again after i had lunch today...kinda feels like a gas bubble that wont pop. both meals i had eaten Ricotta. could this be a sign that i should avoid ricotta? i have had some"spit up" that was white but no real vomiting or nausea. any suggestions? 

TIA

Lisa

Better safe than sorry - call your centre and tell them about what you are experiencing....hope you fell better soon.

Perhaps stop using ricotta for a while and since this seems to be the only food causing it