Periods age and smears

Hi, I'm 48 so perimenopause periods every three weeks ish so not reliable. Had a full normal well for me heavy 7 day period which stopped in time for my smear test. Had the smear then started with brown blood a then a full on heavy period again!!! Just worrying myself silly. Just wish it would stop. Not sure if it's the smear brought it on or just the start of the rubbish before menopause?? I have heavy periods anyway as I have fibroids. Also I get period pain on off through out the month. Anyone else experience this??