Please pleae share your insights!

So this is my first month TTC but I was SURE I was pregnant Im late a week at least and bloated like a pumpkin. I took a blood test and it said less than 1 hcg showing in my system so clearly I'm not. Every sign besided a BFP on a hpt said I was. I am very in tune to my body so I feel like it might have been a chemical then. I still have no AF so I was just wondering for those of you who missed AF or had a chemical how long before your period showed up again in order to try again? I could really use a woman's opinion and don't want to go to the doctor yet as I always worry it could be worse than the simple thing it might be. Any advice would be so greatly and sincerely appreciated!