Am i pregnant

[Cherdillon1]

Hi i had sex with my partner on 19th march and following day had my peroid. The sex was protected however for like 10 minutes no protection was used. I had a normal 4 day peroid. Of late i have been stressed as of work and of having a 11 month old son. After my peroid finished i noticed body feeling weak like aches. Lot gas and adbominal pain lower mainly right side. Right tender breast. Of late i havent not been drinking much water mainly acidy drinks and not been eating healthym my legs are feeling very heavy and i havent not done any exercise at all for weeks. Please help me what could this be