Hi, It is normal to experience gastric symptoms as side effect of hormone therapy. This is why it is always suggested that you take the medications after food and if taking in a single dose, preferably at night. Usually they are mild and subside after a couple of doses, but if they persist, you may need to either stop the medication or use antidotes. As you may not need to use the hormone for a long time since you have been prescribed this for inducing a period, you should be fine. Try some antacid and cold milk for relief. Hope this helps.