I understand your concern.
Relax and do not panic.
All of this symptoms suggest flu
Routine check up with blood investigation will give more idea about it.
For period it can be delayed for few days but if it wont come in next 10 days then consult gynecologist for further assistance.
Till date physician and take treatment of flu like symptoms.
it can be treated with analgesic
I hope i had answered your query.
Feel free to ask.
Get well soon.