Trying to conceive for 18months now

Ladies i was wondering is it possible to get spotting a lighter period for say 2n half days and spotting after and be pregnant ive been given new medication and have a thyroid problem and high prolactin problem but my irregular periods were improving or so i thought last month was different so just wondering my next period is 26th September so im kind of in the middle of my cycle now i presume it was my period but just that it was different im wondering could I be pregnant i feel emotional and tired my iron and vitamin d was low in last blood tests so im on supplements now too shall wait and see im awaiting test results for my thyroid and prolactin so who knows