Hi, my names Nathan I'm 27, for the last 8 months I've had "Coming and going" symptoms, it all started after eating a take away one night.

the first symptoms were everytime i ate I'd have to almost instantly run to the toilet to relieve myself, and felt better every time I'd emptied my bowels, i had a pressure type feeling over my abdomen, i assume this was trapped wind, and a wierd tingly/leaking sensation on the outside of my anus  i took all kinds of approaches to ease these symptoms, a variety of medication + diet changes, after around a month of hardcore dieting and cutting carbohydrates out i felt better, i would eat nothing but greek yoghurt, and lean chicken vegetable stir frys, and lots of almond milk and peppermint green tea, these symptoms almost 97% went away, and I'd just have the odd wind here and there, because my symptoms had gone i started to eat junk again then the symptoms came back, i dieted again and they went away, then back again after eating "normally", i did start to notice a small amount of blood on the toilet paper after wiping, not sure if this is me wiping too hard, anyway the doctor has reffered me to a gastrologist, he says his only concern in the blood, and that my aunty died of bowel cancer (hers was diet so im not sure why he's concerned) but wow I'm absolutely terrified about this, i almost don't want to go incase it could be something, has anyone had similar symptoms? I also have an enlarged lymph node in my right groin around 2cm long, its not wide, it's been there since 2017, I mentioned the  lumpy nodule type things around my abdomen he says its normal so i try not to worry about them anymore, symptoms below

this leaky/tingly feeling on the outside of my anus, is more irratating than anything else,

having to go to the toilet soon after eating, 

that's really the only symptoms i have right now, no bloating, 

alternating stools they're differen't all the time, i don't seem to ever be constipated

and the worst one utter anxiety!