Could i still be pregnant?

ok so i have a three year old daughter when i was pregnant with her i still had my periods i was about 2 and a hlf months pregnant when i found out b/c i didnt know due to still having my periods..well me and my partner were planning to have a baby , on april 3(am) we had unprotective once, that night(april 4th in am) i got my period during..lol, well after my period was over with we unprotective again on the third and fourth i was on the pill but i had missed one that week and was on my inactive pills also i stopped taking my pills on the 8th when i was done with my period(th well we had unprotective again on the 9th more than once...well on the 15th of april i started my period again and i think it is b/c i stopped taking my pills and that period ended on the 21st, well we had unprotective couple more times after that well i have gained wait and just had lots of cravings but i also do like to eat my babydad is for sure that i am pregnant well may 12 i started my period wich is correct b/c its 28 days after ur first last period which was on the 15th of april well could i still be pregnant...due to thefact that i still had my period with my first but i had no other symptoms....now ive heard ur second pregnancy isnt the same as ur first now during my nine months with my daughter i nvr got sick no vomiting or morning sickness just alot of eating and getting fat lol...so i just want to know if there is still a chance i can be pregnant and if i can still take a pregnancy test while im on my period or whatever this bleeding is and no i have no abdominal pain and its a regular flow i only got sick once with a bad cold and aching of bones....serious answers plz thank u