Drinking in TWW

So my husband and I have been TTC for a year now. I have changed my diet and loved every TWW as if I was pregnant. My husband said he thinks I was stressing too much and that's prob what is making it hard to conceive (we have both gotten checked and everything came back great). Several people have said once they stopped worrying they got pregnant. Well I went to a going away party last night and I ended up drinking. I feel so guilty now about it because I am about 3 days into my TWW. I spent the last year following all the healthy lifestyle and living as if I was pregnant!