Too soon to tell

Ta
I had sex with my husband the last day of my period, we didn't pull out and I didn't put anything up there for my period after, just wore a pad because I usually wear a cup. 
Well I learned something new today and I guess cramping can actually be early pregnancy sign for implantation.
I've been having slight dull cramps the last two days but my AF isn't due till 12/29-12/31 (I have the clue app as well and it's estimated time is a few days off but my period usually falls between eve's prediction and Clue's haha.
I am on birth control but I don't always take it the exact minute of every day.
I'm just worried because I'm on a medication that's very risky (Klonopin .5mg) for unborn children and I got drunk last Friday. 
It's way too soon for any test to be accurate but some insight could help.
Also it's not 100% guaranteed that we know if I can have kids because of a big health issue that happened to me when I was 15, we haven't asked a gynecologist yet.