So lost

Lola • Srna , married to my soul mate for 2yrs ttc with our first baby !! We are so excited to start a family
I have take. Several ovulation test now at the high surge peak as of last night my husband and I had intercourse but today I am experiencing slight cramps and light bleeding it's sort of pink(very light) .. Af is not expected till 18th of this month and I am concerned ? I just finished my first round of clomid on last month cycle