I have been on a APRI Tab (which is substituted for Desogen) for ...

I have been on a APRI Tab (which is substituted for Desogen) for 12 days now. I haven't noticed to many bad things about it however, seems like ever since I got on I have been having a very hard time sleeping, I lay in bed for hours each night before falling asleep. This is causing problems because I have a 10 week old baby I have to take care of. I also notice that my period stops but I continue spotting. I've also had a bad headache once and I never think of sex anymore. If anyone is having these problems too please let me know.