First time LSD user wants help please!

So I finally decided to trip on LSD so I ordered 2x 200ug tabs. My question is, since I've tripped quite frequently in the past on shrooms ( I've gone as high as 10gs, I've probably done 10gs around 3 times, my usual dose is 5 though) so I wanted to know if you guys think it might be safe for me to do both at once for 400ug total, but like I said it's my first time so I feel I should probably be careful, the first time I tripped I also tripped on 5gs, thanks for the help :)!