Consumption of I-Pill multiple times is generally not advised as it can create hormonal imbalances which might further delay your periods or aggravate the bleeding in some cases. Your
pregnant/non-pregnant status also depends on how many days after unprotected sexual intercourse you took the I-Pill.
Pregnancy test kits can also sometimes show false negatives if tested too early or if the quality of urine sample is not good.
The symptoms you mentioned are very generalised and can point towards a lot of things. Hence a detailed consultation is advised.
Next Steps
You should opt for further consultation for detailed history and further course of action.
Health Tips
Do not consume further I-Pills during this cycle. Use other modes of contraception.