Advice please!

So I was supposed to start my period yesterday (according to ovulation test) but AF has still yet to show up (she’s never really late). I’ve taken 3 tests (one 11DPO and then one yesterday and one today) all have appeared to be negative. I am using the 88cent Walmart tests. I am going to dinner tonight with friends and I usually have a margarita while I’m with them. Is it okay to go ahead and have a margarita since the tests are showing negative? I’m only questioning the negative tests because I have seen a few reviews that show the 88cent tests showing negative and then other tests coming back positive. Should I take another brand test before we go or just not stress about it and enjoy myself and wait and see if AF shows up in the next few days?? Thanks in advance ladies!!