Chemical pregnancy

Hii, okay so i didnt think i could get pregnant since me and my boyfriend never used protection or pull out before. Few days ago had bad stomach pain and decided to take a test, suprisingly came out positive took 4 strip tests and one Clearblue digital that confirmed it. Two days ago i started bleeding all of a sudden and got these baaaddd cramps, im currently still bleeding day 3 and still have these cramps. pregnancy tests got lighter and im devistated... How quickly can i conceive after my chemical? And does anyone please have tips? I read that fertility is much higher 3 months after a chemical and that some people get pregnant less than 2 weeks after? Please share with me and help a girl out. Im 22 years old