You should to do urine test to rule out Pregnancy
. Pregnancy test kits are available in market, easily.
Because, to be pregnant, not necessarily penis has to penetrate vagina. The slimy watery prostatic fluid on glans penis
contains, sometimes, sperm. And sperm is motile. Therefore even if there was no penetration, chance of pregnancy is a possibility
If pregnancy test is negative, Anaemia
may be a possibility that can give rise to such symptoms etc. Consult a medicine specialist who would evaluate and opine