This month I was 10 days late and convinced myself I must be pregnant, but wasn't and I am pretty sure the reason for having an extra long cycle was that I took ibuprofen for about a week due to tonsillitis just before I normal ovulate, had a positive ovulation test as normal but then another week later another positive and really strong ovulation pains, so I think it pushed my ovulation back by at least a week and therefore delayed af! So annoying definitely won't be taking it again whilst ttc, you would think it would be more well known to avoid it it even says it on the leaflet inside the packet, I reckon it has messed with my cycles at other times as well cause the only times I have been Late are months when I have taken ibuprofen! anyone else had any experiences like this?