Drinking and no Af yet?

So I went out last night trying to take my mind of the whole waiting to take a test I met up with some friend and tried to have a drink I was standing up the whole time which was less than an hr but when I got there I ordered a drink took five sips and had to drink a whole glass of water I was feeling like I was going to pass out I got light headed and felt dizzy now the only time this has happened before was when I was pregnant with my daughter but just as I want to be like yes I might be I feel cramping and the cramping is anywhere between yup period and what was that feeling this wait to test is driving me crazy!! I keep trying to tell myself it's cool if your not no big deal you will one day but every month when I bleed I get sad the first few days then I look forward to the ovulation week ugh idk