8 weeks & pregnancy symptoms

Mel
I am pregnant with my 2nd child. 
With my first I remember mostly feeling mildly nauseous through most of it, really bad heartburn for the last 3-4 months and then bad pelvic pains from having such a big bump. Generally I felt ok.
This time I'm healthier, fitter and thinner but I feel really nauseous all the time, mild headaches, heartburn, constipation, wind and feel shattered all the time.
I am only 8 1/2 weeks pregnant and it feels so much worse this time round.
I have no idea what to do with foods and drinks, lots of things either make me feel more nauseous, more heartburny or give me wind.
Any tips or advice? 😞