If your periods are regular and if you have not missed one it is less likely that you could be pregnant.
But if you are not sure you can go for a HPT.
If you are breastfeeding
your baby, i hope your are not using combined contraceptive
pills as these can be harmful for the baby, it is advisable to use only POPills till you are breastfeeding your baby.
of stomach need not be related to pregnancy
Don't worry,take care.
Dr. Rishma Lakhani