PLZ help

hello,
for the past few weeks(maybe 8) i have been feeling weird. I have been constipated for quite a while now. Everyday i feel dizzy and tired. And after every meal i have a lot of pain in my stomach and have acid.  I am growing very tired of being dizzy and having headaches and stomaches. Can someone plz recommend me something or a doctor that i can see? here are some more of my symptoms.
dizziness
headache
constipation
acid
gas
nervous
stomach ache
nausea(very short periods)
i have had pellet or hard stools lately, but most recently iwas surprised by thin stools.
i also get full very easily.

I appreciate everyone for their help, and hope someone can really help me find a cure.
God bless

[Twilight_Princess]

You need to see a GI specialist to rule out anything.