My guess is it is normal. I am right there with you. I had very regular periods until a year ago. I’d go a few months and a month would pass without a cycle but some spotting. I had a period in June and just started again a few days ago. That’s the longest I have gone without a period. A friend of mine goes through two cycles monthly. Haven’t had my FHS levels tested in years but they were up there the last I checked. I’ve just had to be prepared for periods at all times.