Lemons....

Ok so i have been craving lemons.. and well eating them one a night or one every other. I have had a headache for almost 4 weeks straight except for 3 days when i ran out of lemons for about 5 days and didnt goto the store.. out of those 4 weeks ive had at least 6 migraines. Now im 15+3weeks pregnant ive spoken to my dr and they prescribed meds for the headaches.. but i was doing a little research and found out that if you already have a history of migraines that eating to many lemons can cause more headaches. Something about the citrus in them. I know everything you read online isnt true so im asking has anyone else heard of this or had any experience with it.. it sounds crazy i know.. looking for some insight