Kindly suggest a solution for constipation.

I think i am constipated. Is it normal or should i see a doctor again for this? These days i am pooping sometimes after 3 days then after 2 to 3 days again, but sometimes everyday. I see a doctor one time because i have a hard time passing poop and have a blood after pooping and my aunt nurse told me that i keep pushing it so it bloods and its normal to have blood if you keep pushing so i dont push too much and the doctor gave me a prescription which is a laxative for pooping so i think i got better after that and have no worries but now i cant stop thinking when should i poop, why is it after 2 to 3 days thats making me stress and i think that is also one of the reason because i keep thinking about it. Someone said that i should sit on the toilet long but there's no sign that i can poop so sometimes i dont sit long or I go on the toilet when theres urge to poop, How can my pooping go back to normal and not worry about it?