Blood does get thin with use of aspirin and person may bleed little more when get cut.
Aspirin is unlikely to cause weakness and tiredness and these symptoms may be ther due to uncontrolled diabetes
or even due to anti cholesterol
medicine you are taking.
Aspirin has many benefits in people who are having or have recently had an ishemic stroke or transient ishemic attack ( as in you ).The dose in such person is between 162.5 to 325 mg daily while after attack or stroke,it is given in dose from 81 to 325 mg.
Aspirin has significant benefits in those people who have history of prior events and also with significant high risks like diabetes and hypertension
( as in you ).
There are 2 main side effects of aspirin
1... Stomach upset
,stomach ulcers etc
2... Bleeding....people who take regular aspirin tend to bleed more on getting cut but such type bleeding usually doesn't cause any problem.
Bigger concern comes when bleeding occurs in gastrointestinal tract or in brain.In such cases benefits of aspirin are weighed against the risks.