Help please

Last af was 13-16th April which is short for me also was very light. Next period was due the 13th May, no show. SO works away so can be hard to time things right. The last dates I can remember bd is 14th & 18thApril. Done a test negative. Have the usual ache as if af is coming but nothing shows. Boobs are really sore and so so tired! I don’t get what could be going on. Do I wait and test again or should I make app at the docs? Any advice would be great x