Getting pregnant after chemical

Ta

So I had a chemical this month I found out I was pregnant a couple of days before the 4th of July and I started bleeding July 5th and the bleeding lasted about a week... I know it’s pretty well impossible to be pregnant right now but I’m having serious pregnancy symptoms it’s been about 10 days since the bleeding had stopped and me and my husband have been having unprotected sex since it had stopped I have been pregnant before as I have a 4 month old baby girl and I feel all the same symptoms I did with her I’m super dizzy and light headed like I’m ganna pass out super nauseous tender boobs and nipples and earlier today I was crying and laughing at the same time hysterically for no reason at all... can anyone explain to me what’s going on? There’s no way I could be pregnant already right?