I'm coeliac and lactose intolerant. It's got a lot better since i was diagnosed in 2009, and the bigger complication for me these days comes from being allergic to soya, which is in so many things, often without restaurants thinking about it.
Pizza Express are handy, Nandos too if your local branch is still hot on the cross contamination issue. Sushi is available in many places if you need a quick meal, and while GF bread is not fantastic compared to the real thing, M&S have their made without wheat range which is edible and convenient, if not cheap.
GF pasta is so good these days my husband and son happily eat the same as me. In fact, they don't feel hard done by generally eating gluten free with me.
You may or may not be coeliac. It could be gluten intolerance. And lactose intolerance doesn't mean giving up dairy forever, it just means learning how to read a packet and avoid dairy that contains lactose - check the nutritional panel for the carbohydrates and see the 'of which, sugars' bit for the lactose content of cheese, for example.
So personally, I don't feel too hard done by. I feel very sorry for friends on the FODMAP diet because that is massively restrictive, and eating out is truly a nightmare for them. FWIW, I run a food business that is tailored quite exactly to my own dietary requirements, because way back when the choice was either non-existent or unappealing, and it has definitely been more of a challenge trying to make items for the FODMAP diet than for a gluten, lactose and soya free diet.
So by all means ask your GP for a coeliac blood test, assuming you've kept eating gluten up until now, but also consider doing a proper exclusion diet to work out what exactly is triggering your symptoms. Irritable Bowel Solutions by Prof John Hunter has a whole section about this, and it was what really helped me get finally diagnosed, as I'm one of a minority of people who apparently always respond negatively on blood tests for Ig tests of substances to which I have a demonstrable clinical reaction.