Hi My Baby Is Now 3 Months Old I Got

hi my baby is now 3 months old I got normal bleed after her then a period, me and my partner had unprotected sex and I took morning after pill, and then had the contraception injection, I have been bleeding for nerly over a month, now I got like a little bump not put waight on no where ells and im only a small girl size 8, and now feel sick done a test other day but nothing could I still be pregnant worried