I know exactly how you are feeling. I have had this too- trying to start but can't. Can't say for sure it is normal but common it certainly is. My advice would be to chart things and if it feels wrong then seek advice. Bleeding following high oestrogen signs like ovulation mucus, sore breasts, PMT, is much less likely to be abnormal than random bleeding you are not expecting. I would chart everything so you have got something to show a GP if you continue to worry about it a lot.
Just had another thought as well. My hairdresser really helps me as she is also going through peri and we talk about it a lot. She has had "periods" that are only there when you wipe, some that are really just brown discharge, gaps of 9 months twice, then going back to periods again. Morning anxiety and urgent toilet trips before breakfast. Panic attacks and generally feels like a cripple every morning. Her Mum had the same and finished eventually at 56. I have no sisters, and my Mum is not well enough to know what happened to her, but she had everything removed at 42 so this site is my lifeline. I hope this helps.xxx