TTC 2 YEARS NOW

Ok guys I've been ttc for 2 yrs now with no luck did visit my gyno everything seem fine I made the decision too try another 6 moths natural no luck went back to my OBGYN she put me on clomid 3_7 today am 20dpo ever since the day after O I've been experiencing sore nipples for the past 5 days now I've been cramping a lot and a sharp pain every now and again for 2 days now am really gassy I have Not done a test as yet as glow indicated period in 4 days. Should I wait or do a pregnancy test. Please advise