will not affect the results of the pregnancy
test. it can affect your appetite which might explain at least some of your symptoms, but there could be many explanations for the symptoms even if you are not pregnant. temporary hormonal
fluctuations can explain the symptoms as well, and they will usually resolve on their own in a few days. if they persist, you can see your doctor again to try and figure out what is going on. however, typically they will get better on their own.
I hope this answers your question, please let me know if you need any more help.