I've had IBD for all of my adult life - what sort of tips advice were you looking for, could write a book on it
My main advice would be sceptical if your consultant tells you that diet has no bearing on your condition. It's true that it's not the obvious perpetrator, such as in coeliac disease but I've never met anyone with IBD who can't alleviate (note alleviate, not cure) things with a diet that suits them.
Constipation is your enemy when you have IBD I would say, try and drink lots of water and have a little more fruit and veg but avoid high fibre at the times when it happens. Papaya and pineapple are apparently good fruits for the gut. Periods affect IBD probably because of the progesterone rising and falling. When progesterone is highest during the cycle constipation often occurs, when progersterone is lowest, the digestive tract is no longer slowed, but when you have IBD, your bowel has been irritated by the constipation so it inflames.
Things I have recently found useful:
Taking a probiotic that only contains only acidophilus and plantarum - (inspired by some research I read by Elaine Gottschall who wrote "breaking the vicious cycle)
Cutting out refined sugar as much as possible (difficult and boring but seems to be truly helpful, bad bacteria loves to thrive on sugar it would seem)
Eating soluble fibre but no insoluble fibre
If your colon is ulcerated, do take the prescription medicines but do watch your diet alongside. Be very very aware of the side effects (physical and mental) of steroids if you go on them.
There is new research that too much Omega 6 can cause inflammation so careful with the vegetable oils - an awful lot of food that is sold as healthy is made with sunflower oil that might not be good for us IBD types
In fact, healthy IBD eating can be quite counter intuitive to what you hear as the usual healthy advice, the only thing that seems to really go with current popular health culture is that omega3 fish oils are good.
New research is also showing vitamin D as important so try and get lots of sun
Don't worry too much about vits but have your B12 levels checked has B12 is often low in IBD people.
My bleeding gets worse with some dairy products but not all. Still trying to work out if it's the lactose, the casein or the whey that's getting to me.
I have mixed feelings about NACC (national association for colitis and crohns) but they have useful stuff, do join them.
Sorry, am rambling. Good luck. It's a bloody (literally) horrible disease . Although I've said a lot about diet, do try to not stress about diet as the worrying can also make you feel worse.