TTC with a 7 month old...

Hey ladies! New here, and TTC. My husband and I had our first weekend alone since our son was born last August. We had a few drinks and had unprotected sex several times a day for 3 days straight. Yesterday I woke up and had light spotting when I went to pee, but nothing since. I had a migraine last night, and today I am nauseous, and so extremely tired... Could the spotting have been implantation bleeding? Or is it too soon? I'll be testing in a week or two