Thanks for the query.
If you have had sex during ovulation, there is a possibility of pregnancy. The symptoms that you have right now are not specific of pregnancy and can be due to generalised weakness and tiredness as well.
Kindly do a pregnancy test in case you miss your next cycle to rule out pregnancy.
If negative for pregnancy, check your hemoglobin levels and thyroid levels. Drink plenty of water and have a soft diet until you feel better.
Hope this helped.
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