IBS is a large expression for many bowel-related conditions. I've had it since 1998, it almost killed me [long story short]. Basically I have the slow transit version; my GP gave me Colpermin peppermint capsules as well as Motillium to ease transit. The idea being that I swallowed them within an hour of eating my main meals. I was better within 5 days though it took 3 months B4 the bowel settled completely.
I also eat little and often which seems to help. From the age of 11 my bowel hadn't been filled properly, so the spasm had slowed completely. Gurgling may be a sign that the gut isn't full enough !
During my menstruating years I found that 10 mins B4 a bleed began, I would have to rush to the loo: no arguments

even if a period wasn't due. Definitely hormonal and I guess that yours is probably related. Now it's slow transit with the feeling of needing to 'go' all the while

but fortunately, no painful spasms.
As peri arrived my periods waxed and waned for years: would disappear completely then return for a few months 'regularly'

. For 2-3 years until I noticed in 2002 that that they had disappeared completely . Apart from dry skin and vaginal atrophy, I've been more or less fine since.
Don't despair.