Hi For The Past 3 Weeks I've Gone Out And

Hi for the past 3 weeks I've gone out and every time I drink alcohol first drink instantly makes me feel sick hot sweaty shaky and even sometimes eating on a daily basis makes me feel sick.last night same thing happened by twice I burst into tears too and don't know why.
I also finding sometimes I'm exceptionally more hungry than normal.
I have just had a period and taken a pregnancy test which was instantly negative.
All this is very unlike me I'm not a sicky person
Any ideas?