I've been taking omeprazole for less than a week. I take 20 mg twice daily. I haven't had any problems until last night. Whenever I ejaculated (twice) last night I felt like my heart was beating funny. I couldn't sleep until 5 in the morning after that. I woke up at 9am this morning and I don't feel normal yet. Is there anything I should do? Should I be worried? Is this a major problem?